diff --git a/backend/src/endpoints/auth.rs b/backend/src/endpoints/auth.rs
index 6690521..e629e47 100644
--- a/backend/src/endpoints/auth.rs
+++ b/backend/src/endpoints/auth.rs
@@ -1,7 +1,7 @@
 use std::sync::Mutex;
 use actix_web::{web, post, Responder, HttpResponse};
 use serde_json::json;
-use crate::{State, models::administrator};
+use crate::State;
 
 #[derive(serde::Deserialize)]
 pub struct LoginInfo {
diff --git a/backend/src/endpoints/benchmark.rs b/backend/src/endpoints/benchmark.rs
index 39986a7..401b1aa 100644
--- a/backend/src/endpoints/benchmark.rs
+++ b/backend/src/endpoints/benchmark.rs
@@ -1,5 +1,5 @@
 use std::sync::Mutex;
-use actix_web::{web, get, post, patch, delete, Responder, HttpResponse, HttpRequest};
+use actix_web::{web, get, Responder, HttpResponse};
 use crate::State;
 
 #[get("/benchmark")]
diff --git a/backend/src/endpoints/car.rs b/backend/src/endpoints/car.rs
index dece7c2..0fad886 100644
--- a/backend/src/endpoints/car.rs
+++ b/backend/src/endpoints/car.rs
@@ -27,7 +27,7 @@ pub async fn get_cars(state: web::Data<Mutex<State>>, request: HttpRequest) -> i
 }
 
 #[get("/{id}")]
-pub async fn get_car(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn get_car(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -73,7 +73,7 @@ pub async fn create_car(state: web::Data<Mutex<State>>, json: web::Json<BindingC
 }
 
 #[patch("/{id}")]
-pub async fn update_car(state: web::Data<Mutex<State>>, json: web::Json<BindingCar>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn update_car(state: web::Data<Mutex<State>>, json: web::Json<BindingCar>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -96,7 +96,7 @@ pub async fn update_car(state: web::Data<Mutex<State>>, json: web::Json<BindingC
 }
 
 #[delete("/{id}")]
-pub async fn delete_car(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn delete_car(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
diff --git a/backend/src/endpoints/car_station.rs b/backend/src/endpoints/car_station.rs
index a9caa11..3ef65a4 100644
--- a/backend/src/endpoints/car_station.rs
+++ b/backend/src/endpoints/car_station.rs
@@ -27,7 +27,7 @@ pub async fn get_car_stations(state: web::Data<Mutex<State>>, request: HttpReque
 }
 
 #[get("/{id}")]
-pub async fn get_car_station(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn get_car_station(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -73,7 +73,7 @@ pub async fn create_car_station(state: web::Data<Mutex<State>>, json: web::Json<
 }
 
 #[patch("/{id}")]
-pub async fn update_car_station(state: web::Data<Mutex<State>>, json: web::Json<BindingCarStation>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn update_car_station(state: web::Data<Mutex<State>>, json: web::Json<BindingCarStation>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -96,7 +96,7 @@ pub async fn update_car_station(state: web::Data<Mutex<State>>, json: web::Json<
 }
 
 #[delete("/{id}")]
-pub async fn delete_car_station(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn delete_car_station(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
diff --git a/backend/src/endpoints/client.rs b/backend/src/endpoints/client.rs
index d1cc189..f0d3077 100644
--- a/backend/src/endpoints/client.rs
+++ b/backend/src/endpoints/client.rs
@@ -27,7 +27,7 @@ pub async fn get_clients(state: web::Data<Mutex<State>>, request: HttpRequest) -
 }
 
 #[get("/{id}")]
-pub async fn get_client(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn get_client(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -73,7 +73,7 @@ pub async fn create_client(state: web::Data<Mutex<State>>, json: web::Json<Bindi
 }
 
 #[patch("/{id}")]
-pub async fn update_client(state: web::Data<Mutex<State>>, json: web::Json<BindingClient>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn update_client(state: web::Data<Mutex<State>>, json: web::Json<BindingClient>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -96,7 +96,7 @@ pub async fn update_client(state: web::Data<Mutex<State>>, json: web::Json<Bindi
 }
 
 #[delete("/{id}")]
-pub async fn delete_client(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn delete_client(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
diff --git a/backend/src/endpoints/owner.rs b/backend/src/endpoints/owner.rs
index 7d70b28..c13227d 100644
--- a/backend/src/endpoints/owner.rs
+++ b/backend/src/endpoints/owner.rs
@@ -27,7 +27,7 @@ pub async fn get_owners(state: web::Data<Mutex<State>>, request: HttpRequest) ->
 }
 
 #[get("/{id}")]
-pub async fn get_owner(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn get_owner(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -73,7 +73,7 @@ pub async fn create_owner(state: web::Data<Mutex<State>>, json: web::Json<Bindin
 }
 
 #[patch("/{id}")]
-pub async fn update_owner(state: web::Data<Mutex<State>>, json: web::Json<BindingClient>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn update_owner(state: web::Data<Mutex<State>>, json: web::Json<BindingClient>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -96,7 +96,7 @@ pub async fn update_owner(state: web::Data<Mutex<State>>, json: web::Json<Bindin
 }
 
 #[delete("/{id}")]
-pub async fn delete_owner(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn delete_owner(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
diff --git a/backend/src/endpoints/rent.rs b/backend/src/endpoints/rent.rs
index d3acf38..d263302 100644
--- a/backend/src/endpoints/rent.rs
+++ b/backend/src/endpoints/rent.rs
@@ -12,8 +12,8 @@ pub async fn get_rents(state: web::Data<Mutex<State>>, request: HttpRequest) ->
     let token = token.unwrap();
 
     if let Ok(guard) = state.lock() {
-        if guard.auth_service.administrator_by_token(guard.administrator_repository.as_ref(), token.to_str().unwrap()).await.is_err() {
-            return HttpResponse::Unauthorized().body("Invalid token");
+        if let Err(error) = guard.auth_service.administrator_by_token(guard.administrator_repository.as_ref(), token.to_str().unwrap()).await {
+            return HttpResponse::Unauthorized().body("Invalid token: ".to_owned() + error.as_str());
         }
     }
     
@@ -27,7 +27,7 @@ pub async fn get_rents(state: web::Data<Mutex<State>>, request: HttpRequest) ->
 }
 
 #[get("/{id}")]
-pub async fn get_rent(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn get_rent(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -73,7 +73,7 @@ pub async fn create_rent(state: web::Data<Mutex<State>>, json: web::Json<Binding
 }
 
 #[patch("/{id}")]
-pub async fn update_rent(state: web::Data<Mutex<State>>, json: web::Json<BindingRent>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn update_rent(state: web::Data<Mutex<State>>, json: web::Json<BindingRent>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -96,7 +96,7 @@ pub async fn update_rent(state: web::Data<Mutex<State>>, json: web::Json<Binding
 }
 
 #[delete("/{id}")]
-pub async fn delete_rent(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn delete_rent(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
@@ -119,7 +119,7 @@ pub async fn delete_rent(state: web::Data<Mutex<State>>, path: web::Path<(i32, )
 }
 
 #[get("/{id}/end")]
-pub async fn end_rent(state: web::Data<Mutex<State>>, path: web::Path<(i32, )>, request: HttpRequest) -> impl Responder {
+pub async fn end_rent(state: web::Data<Mutex<State>>, path: web::Path<(String, )>, request: HttpRequest) -> impl Responder {
     let token = request.headers().get("Authorization");
     if token.is_none() {
         return HttpResponse::Unauthorized().body("There is no token");
diff --git a/backend/src/main.rs b/backend/src/main.rs
index 181d294..2efa1bb 100644
--- a/backend/src/main.rs
+++ b/backend/src/main.rs
@@ -111,7 +111,7 @@ async fn main() -> std::io::Result<()> {
                 .service(logout)
             ).service(benchmark)
     })
-        .bind("127.0.0.1:8080")?
+        .bind("0.0.0.0:8080")?
         .run()
         .await
 }
\ No newline at end of file
diff --git a/backend/src/models/administrator.rs b/backend/src/models/administrator.rs
index 3ba74cb..4213a61 100644
--- a/backend/src/models/administrator.rs
+++ b/backend/src/models/administrator.rs
@@ -2,11 +2,11 @@ use serde::{Serialize, Deserialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Administrator {
-    pub id: i32,
+    pub id: String,
     pub username: String,
     pub password: String,
     pub name: String,
     pub surname: String,
     pub middlename: String,
-    pub car_station_id: i32
+    pub car_station_id: String
 }
\ No newline at end of file
diff --git a/backend/src/models/car.rs b/backend/src/models/car.rs
index 8f74de3..1ed9756 100644
--- a/backend/src/models/car.rs
+++ b/backend/src/models/car.rs
@@ -3,12 +3,12 @@ use serde::{Serialize, Deserialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Car {
-    pub id: i32,
+    pub id: String,
     pub brand: String,
     pub model: String,
     pub price: Decimal,
-    pub owner_id: i32,
-    pub car_station_id: i32
+    pub owner_id: String,
+    pub car_station_id: String
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -16,13 +16,13 @@ pub struct BindingCar {
     pub brand: String,
     pub model: String,
     pub price: Decimal,
-    pub owner_id: i32,
-    pub car_station_id: i32
+    pub owner_id: String,
+    pub car_station_id: String
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Report {
-    pub car_id: i32,
+    pub car_id: String,
     pub brand: String,
     pub model: String,
     pub times: i64,
diff --git a/backend/src/models/car_station.rs b/backend/src/models/car_station.rs
index 1e208a2..28ae5d1 100644
--- a/backend/src/models/car_station.rs
+++ b/backend/src/models/car_station.rs
@@ -2,7 +2,7 @@ use serde::{Serialize, Deserialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CarStation {
-    pub id: i32,
+    pub id: String,
     pub address: String
 }
 
diff --git a/backend/src/models/client.rs b/backend/src/models/client.rs
index 0e0f7a7..41786a4 100644
--- a/backend/src/models/client.rs
+++ b/backend/src/models/client.rs
@@ -2,7 +2,7 @@ use serde::{Serialize, Deserialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Client {
-    pub id: i32,
+    pub id: String,
     pub name: String,
     pub surname: String,
     pub middlename: Option<String>,
diff --git a/backend/src/models/rent.rs b/backend/src/models/rent.rs
index 1566902..9da3e8a 100644
--- a/backend/src/models/rent.rs
+++ b/backend/src/models/rent.rs
@@ -2,16 +2,16 @@ use serde::{Serialize, Deserialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Rent {
-    pub id: i32,
+    pub id: String,
     pub start_time: chrono::NaiveDateTime,
     pub time_amount: Option<i32>,
-    pub client_id: i32,
-    pub car_id: i32
+    pub client_id: String,
+    pub car_id: String
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct BindingRent {
     pub time_amount: Option<i32>,
-    pub client_id: i32,
-    pub car_id: i32
+    pub client_id: String,
+    pub car_id: String
 }
\ No newline at end of file
diff --git a/backend/src/services/auth.rs b/backend/src/services/auth.rs
index 184e818..79d3280 100644
--- a/backend/src/services/auth.rs
+++ b/backend/src/services/auth.rs
@@ -4,7 +4,7 @@ use sha2::Sha256;
 use std::cell::RefCell;
 
 pub struct AuthService {
-    authed: RefCell<Vec::<(String, i32)>>
+    authed: RefCell<Vec::<(String, String)>>
 }
 
 impl AuthService {
@@ -12,14 +12,14 @@ impl AuthService {
         AuthService { authed: RefCell::new(Vec::new()) }
     }
 
-    pub async fn login(&self, storage: &dyn AdministratorRepository, username: &str, password: &str) -> Result<(String, i32, i32), String> {
+    pub async fn login(&self, storage: &dyn AdministratorRepository, username: &str, password: &str) -> Result<(String, String, String), String> {
         let administrator = storage.find_by_username(&username).await?;
         if pbkdf2::pbkdf2_hmac_array::<Sha256, 32>(password.as_bytes(), dotenv_codegen::dotenv!("SALT").as_bytes(), 4096).iter().map(|x| format!("{:x}", x)).collect::<String>() != administrator.password {
             Err("Invalid password or login!".to_owned())
         } else {
             let token = nanoid!(32);
-            self.authed.borrow_mut().push((token.clone(), administrator.id));
-            Ok((token, administrator.id, administrator.car_station_id))
+            self.authed.borrow_mut().push((token.clone(), administrator.id.clone()));
+            Ok((token, administrator.id.clone(), administrator.car_station_id))
         }
     }
 
@@ -28,7 +28,7 @@ impl AuthService {
     }
 
     pub async fn administrator_by_token(&self, storage: &dyn AdministratorRepository, token: &str) -> Result<Administrator, String> {
-        let id = self.authed.borrow().iter().find(|&x| x.0.starts_with(token)).ok_or("Invalid token")?.1;
+        let id = self.authed.borrow().iter().find(|&x| x.0.starts_with(token)).ok_or("Invalid token")?.1.clone();
         storage.read(id).await
     }
 }
\ No newline at end of file
diff --git a/backend/src/storages/mod.rs b/backend/src/storages/mod.rs
index 4acaacf..a60a3bc 100644
--- a/backend/src/storages/mod.rs
+++ b/backend/src/storages/mod.rs
@@ -1,2 +1,3 @@
 pub mod traits;
-pub mod postgres;
\ No newline at end of file
+pub mod postgres;
+pub mod mongo;
\ No newline at end of file
diff --git a/backend/src/storages/mongo/mod.rs b/backend/src/storages/mongo/mod.rs
new file mode 100644
index 0000000..e69de29
diff --git a/backend/src/storages/postgres/administrator.rs b/backend/src/storages/postgres/administrator.rs
index 312adda..1603fad 100644
--- a/backend/src/storages/postgres/administrator.rs
+++ b/backend/src/storages/postgres/administrator.rs
@@ -10,21 +10,21 @@ pub struct PostgresAdministratorRepository {
 
 #[async_trait]
 impl AdministratorRepository for PostgresAdministratorRepository {
-    async fn read(&self, id: i32) -> Result<Administrator, String> {
+    async fn read(&self, id: String) -> Result<Administrator, String> {
         let result = self.connection.query(
-            "SELECT * FROM administrator WHERE id = $1", &[&id]
+            "SELECT * FROM administrator WHERE id = $1", &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).ok_or("Administrator not found".to_owned())?;
             Ok(Administrator {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 username: row.get("username"),
                 password: row.get("password"),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
-                car_station_id: row.get("car_station_id")
+                car_station_id: row.get::<&str, i32>("car_station_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
@@ -37,13 +37,13 @@ impl AdministratorRepository for PostgresAdministratorRepository {
         if let Ok(rows) = result {
             let row = rows.get(0).ok_or("Administrator not found".to_owned())?;
             Ok(Administrator {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 username: row.get("username"),
                 password: row.get("password"),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
-                car_station_id: row.get("car_station_id")
+                car_station_id: row.get::<&str, i32>("car_station_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
diff --git a/backend/src/storages/postgres/benchmark.rs b/backend/src/storages/postgres/benchmark.rs
index 1143190..59fa652 100644
--- a/backend/src/storages/postgres/benchmark.rs
+++ b/backend/src/storages/postgres/benchmark.rs
@@ -17,7 +17,7 @@ impl BenchmarkRepository for PostgresBenchmarkRepository {
 
         let start_time = chrono::Utc::now().naive_local();
 
-        for n in 1..201 {
+        for n in 1..2001 {
             let str = format!("INSERT INTO Owner(name, surname, middlename, phone) VALUES ('Иван{0}', 'Иванов{0}', 'Иванович{0}', {0}) RETURNING id", n);
             let owner_id: i32 = self.connection.query(
                 &str, 
@@ -36,7 +36,7 @@ impl BenchmarkRepository for PostgresBenchmarkRepository {
             ).await.unwrap().get(0).unwrap().get(0);
 
             let str = format!("INSERT INTO Rent(car_id, client_id, start_time, time_amount) VALUES ({1}, {2}, now()::timestamp, {0}) RETURNING id", n, car_id, client_id);
-            let rent_id: i32 = self.connection.query(
+            let _: i32 = self.connection.query(
                 &str, 
                 &[]
             ).await.unwrap().get(0).unwrap().get(0);
diff --git a/backend/src/storages/postgres/car.rs b/backend/src/storages/postgres/car.rs
index 0fb80b8..19714f1 100644
--- a/backend/src/storages/postgres/car.rs
+++ b/backend/src/storages/postgres/car.rs
@@ -14,38 +14,38 @@ impl CarRepository for PostgresCarRepository {
         let result = self.connection.query(
             "INSERT INTO Car(brand, model, price, owner_id, car_station_id) \
             VALUES ($1, $2, $3, $4, $5) RETURNING *",
-            &[&car.brand, &car.model, &car.price, &car.owner_id, &car.car_station_id]
+            &[&car.brand, &car.model, &car.price, &car.owner_id.parse::<i32>().unwrap(), &car.car_station_id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).unwrap();
             Ok(Car {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 brand: row.get("brand"),
                 model: row.get("model"),
                 price: row.get("price"),
-                owner_id: row.get("owner_id"),
-                car_station_id: row.get("car_station_id")
+                owner_id: row.get::<&str, i32>("owner_id").to_string(),
+                car_station_id: row.get::<&str, i32>("car_station_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
         }
     }
 
-    async fn read(&self, id: i32) -> Result<Car, String> {
+    async fn read(&self, id: String) -> Result<Car, String> {
         let result = self.connection.query(
-            "SELECT * FROM Car WHERE id = $1", &[&id]
+            "SELECT * FROM Car WHERE id = $1", &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).ok_or("Car not found".to_owned())?;
             Ok(Car {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 brand: row.get("brand"),
                 model: row.get("model"),
                 price: row.get("price"),
-                owner_id: row.get("owner_id"),
-                car_station_id: row.get("car_station_id")
+                owner_id: row.get::<&str, i32>("owner_id").to_string(),
+                car_station_id: row.get::<&str, i32>("car_station_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
@@ -60,12 +60,12 @@ impl CarRepository for PostgresCarRepository {
         if let Ok(rows) = result {
             Ok(
                 rows.into_iter().map(|r| Car {
-                    id: r.get("id"),
+                    id: r.get::<&str, i32>("id").to_string(),
                     brand: r.get("brand"),
                     model: r.get("model"),
                     price: r.get("price"),
-                    owner_id: r.get("owner_id"),
-                    car_station_id: r.get("car_station_id")
+                    owner_id: r.get::<&str, i32>("owner_id").to_string(),
+                    car_station_id: r.get::<&str, i32>("car_station_id").to_string()
                 }).collect()
             )
         } else {
@@ -73,31 +73,31 @@ impl CarRepository for PostgresCarRepository {
         }
     }
 
-    async fn update(&self, id: i32, car: BindingCar) -> Result<Car, String> {
+    async fn update(&self, id: String, car: BindingCar) -> Result<Car, String> {
         let result = self.connection.query(
             "UPDATE Car SET brand = $1, model = $2, price = $3, owner_id = $4, car_station_id = $5 WHERE id = $6 RETURNING *",
-            &[&car.brand, &car.model, &car.price, &car.owner_id, &car.car_station_id, &id]
+            &[&car.brand, &car.model, &car.price, &car.owner_id.parse::<i32>().unwrap(), &car.car_station_id.parse::<i32>().unwrap(), &id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = &result {
             let row = rows.get(0).unwrap();
             Ok(Car {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 brand: row.get("brand"),
                 model: row.get("model"),
                 price: row.get("price"),
-                owner_id: row.get("owner_id"),
-                car_station_id: row.get("car_station_id")
+                owner_id: row.get::<&str, i32>("owner_id").to_string(),
+                car_station_id: row.get::<&str, i32>("car_station_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
         }
     }
 
-    async fn delete(&self, id: i32) -> Result<(), String> {
+    async fn delete(&self, id: String) -> Result<(), String> {
         let result = self.connection.execute(
             "DELETE FROM Car WHERE id = $1",
-            &[&id]
+            &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
@@ -129,7 +129,7 @@ impl CarRepository for PostgresCarRepository {
             Ok(
                 rows.into_iter()
                     .map(|row| Report {
-                        car_id: row.get("car_id"),
+                        car_id: row.get::<&str, i32>("car_id").to_string(),
                         brand: row.get("brand"),
                         model: row.get("model"),
                         times: row.get("times"),
diff --git a/backend/src/storages/postgres/car_station.rs b/backend/src/storages/postgres/car_station.rs
index 1fb7805..8b3d6c7 100644
--- a/backend/src/storages/postgres/car_station.rs
+++ b/backend/src/storages/postgres/car_station.rs
@@ -19,7 +19,7 @@ impl CarStationRepository for PostgresCarStationRepository {
         if let Ok(rows) = result {
             let row = rows.get(0).unwrap();
             Ok(CarStation {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 address: row.get("address")
             })
         } else {
@@ -27,15 +27,15 @@ impl CarStationRepository for PostgresCarStationRepository {
         }
     }
 
-    async fn read(&self, id: i32) -> Result<CarStation, String> {
+    async fn read(&self, id: String) -> Result<CarStation, String> {
         let result = self.connection.query(
-            "SELECT * FROM Car_Station WHERE id = $1", &[&id]
+            "SELECT * FROM Car_Station WHERE id = $1", &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).ok_or("CarStation not found".to_owned())?;
             Ok(CarStation {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 address: row.get("address")
             })
         } else {
@@ -51,7 +51,7 @@ impl CarStationRepository for PostgresCarStationRepository {
         if let Ok(rows) = result {
             Ok(
                 rows.into_iter().map(|r| CarStation {
-                    id: r.get("id"),
+                    id: r.get::<&str, i32>("id").to_string(),
                     address: r.get("address")
                 }).collect()
             )
@@ -60,16 +60,16 @@ impl CarStationRepository for PostgresCarStationRepository {
         }
     }
 
-    async fn update(&self, id: i32, car_station: BindingCarStation) -> Result<CarStation, String> {
+    async fn update(&self, id: String, car_station: BindingCarStation) -> Result<CarStation, String> {
         let result = self.connection.query(
             "UPDATE Car_Station SET address = $1 WHERE id = $2 RETURNING *",
-            &[&car_station.address, &id]
+            &[&car_station.address, &id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).unwrap();
             Ok(CarStation {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 address: row.get("address")
             })
         } else {
@@ -77,10 +77,10 @@ impl CarStationRepository for PostgresCarStationRepository {
         }
     }
 
-    async fn delete(&self, id: i32) -> Result<(), String> {
+    async fn delete(&self, id: String) -> Result<(), String> {
         let result = self.connection.execute(
             "DELETE FROM Car_Station WHERE id = $1",
-            &[&id]
+            &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
diff --git a/backend/src/storages/postgres/client.rs b/backend/src/storages/postgres/client.rs
index 6ad6b23..f3d5aba 100644
--- a/backend/src/storages/postgres/client.rs
+++ b/backend/src/storages/postgres/client.rs
@@ -20,7 +20,7 @@ impl ClientRepository for PostgresClientRepository {
         if let Ok(rows) = &result {
             let row = rows.get(0).unwrap();
             Ok(Client {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
@@ -31,16 +31,16 @@ impl ClientRepository for PostgresClientRepository {
         }
     }
 
-    async fn read(&self, id: i32) -> Result<Client, String> {
+    async fn read(&self, id: String) -> Result<Client, String> {
         let result= self.connection.query(
-            "SELECT * FROM Client WHERE id = $1", &[&id]
+            "SELECT * FROM Client WHERE id = $1", &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
 
             let row = rows.get(0).ok_or("Client not found".to_owned())?;
             Ok(Client {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
@@ -59,7 +59,7 @@ impl ClientRepository for PostgresClientRepository {
         if let Ok(rows) = result {
             Ok(
                 rows.into_iter().map(|r| Client {
-                    id: r.get("id"),
+                    id: r.get::<&str, i32>("id").to_string(),
                     name: r.get("name"),
                     surname: r.get("surname"),
                     middlename: r.get("middlename"),
@@ -71,17 +71,17 @@ impl ClientRepository for PostgresClientRepository {
         }
     }
 
-    async fn update(&self, id: i32, client: BindingClient) -> Result<Client, String> {
+    async fn update(&self, id: String, client: BindingClient) -> Result<Client, String> {
         let result = self.connection.query(
             "UPDATE Client SET name = $1, surname = $2, middlename = $3, phone = $4 \
             WHERE id = $5 RETURNING *",
-            &[&client.name, &client.surname, &client.middlename, &client.phone, &id]
+            &[&client.name, &client.surname, &client.middlename, &client.phone, &id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).unwrap();
             Ok(Client {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
@@ -92,10 +92,10 @@ impl ClientRepository for PostgresClientRepository {
         }
     }
 
-    async fn delete(&self, id: i32) -> Result<(), String> {
+    async fn delete(&self, id: String) -> Result<(), String> {
         let result = self.connection.execute(
             "DELETE FROM Client WHERE id = $1",
-            &[&id]
+            &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
diff --git a/backend/src/storages/postgres/owner.rs b/backend/src/storages/postgres/owner.rs
index 6ae5f1c..504c851 100644
--- a/backend/src/storages/postgres/owner.rs
+++ b/backend/src/storages/postgres/owner.rs
@@ -20,7 +20,7 @@ impl OwnerRepository for PostgresOwnerRepository {
         if let Ok(rows) = &result {
             let row = rows.get(0).unwrap();
             Ok(Client {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
@@ -31,16 +31,16 @@ impl OwnerRepository for PostgresOwnerRepository {
         }
     }
 
-    async fn read(&self, id: i32) -> Result<Client, String> {
+    async fn read(&self, id: String) -> Result<Client, String> {
         let result= self.connection.query(
-            "SELECT * FROM Owner WHERE id = $1", &[&id]
+            "SELECT * FROM Owner WHERE id = $1", &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
 
             let row = rows.get(0).ok_or("Owner not found".to_owned())?;
             Ok(Client {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
@@ -59,7 +59,7 @@ impl OwnerRepository for PostgresOwnerRepository {
         if let Ok(rows) = result {
             Ok(
                 rows.into_iter().map(|r| Client {
-                    id: r.get("id"),
+                    id: r.get::<&str, i32>("id").to_string(),
                     name: r.get("name"),
                     surname: r.get("surname"),
                     middlename: r.get("middlename"),
@@ -71,17 +71,17 @@ impl OwnerRepository for PostgresOwnerRepository {
         }
     }
 
-    async fn update(&self, id: i32, client: BindingClient) -> Result<Client, String> {
+    async fn update(&self, id: String, client: BindingClient) -> Result<Client, String> {
         let result = self.connection.query(
             "UPDATE Owner SET name = $1, surname = $2, middlename = $3, phone = $4 \
             WHERE id = $5 RETURNING *",
-            &[&client.name, &client.surname, &client.middlename, &client.phone, &id]
+            &[&client.name, &client.surname, &client.middlename, &client.phone, &id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).unwrap();
             Ok(Client {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 name: row.get("name"),
                 surname: row.get("surname"),
                 middlename: row.get("middlename"),
@@ -92,10 +92,10 @@ impl OwnerRepository for PostgresOwnerRepository {
         }
     }
 
-    async fn delete(&self, id: i32) -> Result<(), String> {
+    async fn delete(&self, id: String) -> Result<(), String> {
         let result = self.connection.execute(
             "DELETE FROM Owner WHERE id = $1",
-            &[&id]
+            &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
diff --git a/backend/src/storages/postgres/rent.rs b/backend/src/storages/postgres/rent.rs
index 84ed6a9..b498bcb 100644
--- a/backend/src/storages/postgres/rent.rs
+++ b/backend/src/storages/postgres/rent.rs
@@ -13,7 +13,7 @@ impl RentRepository for PostgresRentRepository {
     async fn create(&self, rent: BindingRent) -> Result<Rent, String> {
         let query_result = self.connection.query(
             "SELECT * FROM Rent WHERE car_id=$1 AND time_amount IS NULL",
-            &[&rent.car_id]
+            &[&rent.car_id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = query_result {
@@ -27,36 +27,36 @@ impl RentRepository for PostgresRentRepository {
         let result = self.connection.query(
             "INSERT INTO Rent(time_amount, client_id, car_id) \
             VALUES ($1, $2, $3) RETURNING *",
-            &[&rent.time_amount, &rent.client_id, &rent.car_id]
+            &[&rent.time_amount, &rent.client_id.parse::<i32>().unwrap(), &rent.car_id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).unwrap();
             Ok(Rent {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 start_time: row.get("start_time"),
                 time_amount: row.get("time_amount"),
-                client_id: row.get("client_id"),
-                car_id: row.get("car_id")
+                client_id: row.get::<&str, i32>("client_id").to_string(),
+                car_id: row.get::<&str, i32>("car_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
         }
     }
 
-    async fn read(&self, id: i32) -> Result<Rent, String> {
+    async fn read(&self, id: String) -> Result<Rent, String> {
         let result = self.connection.query(
-            "SELECT * FROM Rent WHERE id = $1", &[&id]
+            "SELECT * FROM Rent WHERE id = $1", &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).ok_or("Rent not found".to_owned())?;
             Ok(Rent {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 start_time: row.get("start_time"),
                 time_amount: row.get("time_amount"),
-                client_id: row.get("client_id"),
-                car_id: row.get("car_id")
+                client_id: row.get::<&str, i32>("client_id").to_string(),
+                car_id: row.get::<&str, i32>("car_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
@@ -71,11 +71,11 @@ impl RentRepository for PostgresRentRepository {
         if let Ok(rows) = result {
             Ok(
                 rows.into_iter().map(|r| Rent {
-                    id: r.get("id"),
+                    id: r.get::<&str, i32>("id").to_string(),
                     start_time: r.get("start_time"),
                     time_amount: r.get("time_amount"),
-                    client_id: r.get("client_id"),
-                    car_id: r.get("car_id")
+                    client_id: r.get::<&str, i32>("client_id").to_string(),
+                    car_id: r.get::<&str, i32>("car_id").to_string()
                 }).collect()
             )
         } else {
@@ -83,29 +83,29 @@ impl RentRepository for PostgresRentRepository {
         }
     }
 
-    async fn update(&self, id: i32, rent: BindingRent) -> Result<Rent, String> {
+    async fn update(&self, id: String, rent: BindingRent) -> Result<Rent, String> {
         let result = self.connection.query(
             "UPDATE Rent SET time_amount = $2, client_id = $3, car_id = $4 WHERE id = $5 RETURNING *",
-            &[&rent.time_amount, &rent.client_id, &rent.car_id, &id]
+            &[&rent.time_amount, &rent.client_id.parse::<i32>().unwrap(), &rent.car_id.parse::<i32>().unwrap(), &id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(rows) = result {
             let row = rows.get(0).unwrap();
             Ok(Rent {
-                id: row.get("id"),
+                id: row.get::<&str, i32>("id").to_string(),
                 start_time: row.get("start_time"),
                 time_amount: row.get("time_amount"),
-                client_id: row.get("client_id"),
-                car_id: row.get("car_id")
+                client_id: row.get::<&str, i32>("client_id").to_string(),
+                car_id: row.get::<&str, i32>("car_id").to_string()
             })
         } else {
             Err(result.unwrap_err().to_string())
         }
     }
 
-    async fn delete(&self, id: i32) -> Result<(), String> {
+    async fn delete(&self, id: String) -> Result<(), String> {
         let result = self.connection.execute(
-            "DELETE FROM Rent WHERE id = $1", &[&id]
+            "DELETE FROM Rent WHERE id = $1", &[&id.parse::<i32>().unwrap()]
         ).await;
 
         if let Ok(_) = result {
@@ -115,8 +115,8 @@ impl RentRepository for PostgresRentRepository {
         }
     }
 
-    async fn end_rent(&self, id: i32) -> Result<(), String> {
-        let current_rent = self.read(id).await?;
+    async fn end_rent(&self, id: String) -> Result<(), String> {
+        let current_rent = self.read(id.clone()).await?;
 
         if current_rent.time_amount.is_some() {
             return Err("Rent is already ended".to_owned());
@@ -124,7 +124,7 @@ impl RentRepository for PostgresRentRepository {
 
         let time_amount = (self.connection.query("SELECT now()::timestamp", &[]).await.unwrap().get(0).unwrap().get::<usize, chrono::NaiveDateTime>(0) - current_rent.start_time).num_minutes() as i32;
 
-        match self.connection.execute("UPDATE Rent SET time_amount = $2 WHERE id = $1", &[&id, &time_amount]).await {
+        match self.connection.execute("UPDATE Rent SET time_amount = $2 WHERE id = $1", &[&id.parse::<i32>().unwrap(), &time_amount]).await {
             Ok(_) => Ok(()),
             Err(err) => Err(err.to_string())
         }
diff --git a/backend/src/storages/traits.rs b/backend/src/storages/traits.rs
index bf03e53..865f32f 100644
--- a/backend/src/storages/traits.rs
+++ b/backend/src/storages/traits.rs
@@ -8,53 +8,53 @@ use async_trait::async_trait;
 #[async_trait]
 pub trait ClientRepository {
     async fn create(&self, client: BindingClient) -> Result<Client, String>;
-    async fn read(&self, id: i32) -> Result<Client, String>;
+    async fn read(&self, id: String) -> Result<Client, String>;
     async fn read_all(&self) -> Result<Vec<Client>, String>;
-    async fn update(&self, id: i32, client: BindingClient) -> Result<Client, String>;
-    async fn delete(&self, id: i32) -> Result<(), String>;
+    async fn update(&self, id: String, client: BindingClient) -> Result<Client, String>;
+    async fn delete(&self, id: String) -> Result<(), String>;
 }
 
 #[async_trait]
 pub trait CarRepository {
     async fn create(&self, car: BindingCar) -> Result<Car, String>;
-    async fn read(&self, id: i32) -> Result<Car, String>;
+    async fn read(&self, id: String) -> Result<Car, String>;
     async fn read_all(&self) -> Result<Vec<Car>, String>;
-    async fn update(&self, id: i32, car: BindingCar) -> Result<Car, String>;
-    async fn delete(&self, id: i32) -> Result<(), String>;
+    async fn update(&self, id: String, car: BindingCar) -> Result<Car, String>;
+    async fn delete(&self, id: String) -> Result<(), String>;
     async fn get_report(&self) -> Result<Vec<Report>, String>;
 }
 
 #[async_trait]
 pub trait CarStationRepository {
     async fn create(&self, car_station: BindingCarStation) -> Result<CarStation, String>;
-    async fn read(&self, id: i32) -> Result<CarStation, String>;
+    async fn read(&self, id: String) -> Result<CarStation, String>;
     async fn read_all(&self) -> Result<Vec<CarStation>, String>;
-    async fn update(&self, id: i32, car_station: BindingCarStation) -> Result<CarStation, String>;
-    async fn delete(&self, id: i32) -> Result<(), String>;
+    async fn update(&self, id: String, car_station: BindingCarStation) -> Result<CarStation, String>;
+    async fn delete(&self, id: String) -> Result<(), String>;
 }
 
 #[async_trait]
 pub trait RentRepository {
     async fn create(&self, rent: BindingRent) -> Result<Rent, String>;
-    async fn read(&self, id: i32) -> Result<Rent, String>;
+    async fn read(&self, id: String) -> Result<Rent, String>;
     async fn read_all(&self) -> Result<Vec<Rent>, String>;
-    async fn update(&self, id: i32, rent: BindingRent) -> Result<Rent, String>;
-    async fn delete(&self, id: i32) -> Result<(), String>;
-    async fn end_rent(&self, id: i32) -> Result<(), String>;
+    async fn update(&self, id: String, rent: BindingRent) -> Result<Rent, String>;
+    async fn delete(&self, id: String) -> Result<(), String>;
+    async fn end_rent(&self, id: String) -> Result<(), String>;
 }
 
 #[async_trait]
 pub trait OwnerRepository {
     async fn create(&self, client: BindingClient) -> Result<Client, String>;
-    async fn read(&self, id: i32) -> Result<Client, String>;
+    async fn read(&self, id: String) -> Result<Client, String>;
     async fn read_all(&self) -> Result<Vec<Client>, String>;
-    async fn update(&self, id: i32, client: BindingClient) -> Result<Client, String>;
-    async fn delete(&self, id: i32) -> Result<(), String>;
+    async fn update(&self, id: String, client: BindingClient) -> Result<Client, String>;
+    async fn delete(&self, id: String) -> Result<(), String>;
 }
 
 #[async_trait]
 pub trait AdministratorRepository {
-    async fn read(&self, id: i32) -> Result<Administrator, String>;
+    async fn read(&self, id: String) -> Result<Administrator, String>;
     async fn find_by_username(&self, username: &str) -> Result<Administrator, String>;
 }
 
diff --git a/frontend/app.py b/frontend/app.py
index 72e406e..4dbc1d0 100644
--- a/frontend/app.py
+++ b/frontend/app.py
@@ -420,4 +420,4 @@ def admin():
 
 
 if __name__ == '__main__':
-    app.run()
+    app.run(host='0.0.0.0', port='5000')