diff --git a/demo/src/main/java/com/example/demo/core/config/Constants.java b/demo/src/main/java/com/example/demo/core/config/Constants.java
index c62b4c9..454f0de 100644
--- a/demo/src/main/java/com/example/demo/core/config/Constants.java
+++ b/demo/src/main/java/com/example/demo/core/config/Constants.java
@@ -1,5 +1,6 @@
 package com.example.demo.core.config;
 
 public class Constants {
+    public static final String SEQUENCE_NAME = "hibernate_sequence";
     public static final String API_URL = "/api_3";
 }
diff --git a/demo/src/main/java/com/example/demo/core/error/NotFoundException.java b/demo/src/main/java/com/example/demo/core/error/NotFoundException.java
index 64cb700..eac0fa7 100644
--- a/demo/src/main/java/com/example/demo/core/error/NotFoundException.java
+++ b/demo/src/main/java/com/example/demo/core/error/NotFoundException.java
@@ -1,7 +1,7 @@
 package com.example.demo.core.error;
 
 public class NotFoundException  extends  RuntimeException {
-    public NotFoundException(long id) {
-        super(String.format("Entity with id {%s} is not found or not exists", id));
+    public <T> NotFoundException(Class<T> clazz, Long id) {
+        super(String.format("%s with id [%s] is not found or not exists", clazz.getSimpleName(), id));
     }
 }
diff --git a/demo/src/main/java/com/example/demo/core/model/BaseEntity.java b/demo/src/main/java/com/example/demo/core/model/BaseEntity.java
index 400bb42..ca02c45 100644
--- a/demo/src/main/java/com/example/demo/core/model/BaseEntity.java
+++ b/demo/src/main/java/com/example/demo/core/model/BaseEntity.java
@@ -1,19 +1,28 @@
 package com.example.demo.core.model;
 
+import  com.example.demo.core.config.Constants;
+
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.MappedSuperclass;
+import jakarta.persistence.SequenceGenerator;
+
+@MappedSuperclass
 public abstract class BaseEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = Constants.SEQUENCE_NAME)
+    @SequenceGenerator(name = Constants.SEQUENCE_NAME, sequenceName = Constants.SEQUENCE_NAME, allocationSize = 1)
     protected Long id;
 
-    protected BaseEntity(){
-
-    }
-    protected BaseEntity(Long id){
-        this.id = id;
+    protected BaseEntity() {
     }
 
-    public Long getId(){
+    public Long getId() {
         return id;
     }
-    public void setId(Long id){
+
+    public void setId(Long id) {
         this.id = id;
     }
-}
+}
\ No newline at end of file
diff --git a/demo/src/main/java/com/example/demo/core/repository/CommonRepository.java b/demo/src/main/java/com/example/demo/core/repository/CommonRepository.java
deleted file mode 100644
index b5f11f9..0000000
--- a/demo/src/main/java/com/example/demo/core/repository/CommonRepository.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.example.demo.core.repository;
-
-import java.util.List;
-
-public interface CommonRepository<E, T> {
-    List<E> getAll();
-    E get(T id);
-    E create(E entity);
-    E update(E entity);
-    E delete(E entity);
-    void deleteAll();
-}
diff --git a/demo/src/main/java/com/example/demo/core/repository/MapRepository.java b/demo/src/main/java/com/example/demo/core/repository/MapRepository.java
deleted file mode 100644
index 3b4726b..0000000
--- a/demo/src/main/java/com/example/demo/core/repository/MapRepository.java
+++ /dev/null
@@ -1,56 +0,0 @@
-package com.example.demo.core.repository;
-
-import com.example.demo.core.model.BaseEntity;
-
-import java.util.List;
-import java.util.Map;
-import java.util.TreeMap;
-
-public abstract class MapRepository<E extends BaseEntity> implements CommonRepository<E, Long> {
-    private final Map<Long, E> entities = new TreeMap<>();
-    private Long lastId = 0L;
-    protected MapRepository(){
-
-    }
-    @Override
-    public List<E> getAll(){
-        return entities.values().stream().toList();
-    }
-
-    @Override
-    public E get(Long id) {
-        return entities.get(id);
-    }
-
-    @Override
-    public E create(E entity){
-        entity.setId(++lastId);
-        entities.put(lastId, entity);
-        return entity;
-    }
-
-    @Override
-    public E update(E entity){
-        if (get(entity.getId()) == null){
-            return null;
-        }
-        entities.put(entity.getId(), entity);
-        return entity;
-    }
-
-    @Override
-    public E delete(E entity){
-        if (get(entity.getId()) == null){
-            return null;
-        }
-        entities.remove(entity.getId());
-        return entity;
-    }
-
-    @Override
-    public void deleteAll(){
-        long count = lastId;
-        lastId = 0L;
-        entities.clear();
-    }
-}
diff --git a/demo/src/main/java/com/example/demo/games/model/GameEntity.java b/demo/src/main/java/com/example/demo/games/model/GameEntity.java
index a77ba75..8d364fb 100644
--- a/demo/src/main/java/com/example/demo/games/model/GameEntity.java
+++ b/demo/src/main/java/com/example/demo/games/model/GameEntity.java
@@ -1,18 +1,29 @@
 package com.example.demo.games.model;
 
 import com.example.demo.core.model.BaseEntity;
+import com.example.demo.tables.model.BookingEntity;
+import com.example.demo.users.model.UserEntity;
+import jakarta.persistence.*;
 
-import java.util.Date;
+import java.util.List;
 
+@Entity
+@Table(name = "game")
 public class GameEntity extends BaseEntity {
+    @Column(nullable = false, unique = true, length = 100)
     private String name;
 
+    @ManyToMany(mappedBy = "user_game")
+    private List<UserEntity> users;
+
+    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
+    @OrderBy("date desc")
+    List<BookingEntity> bookings;
+
     public GameEntity() {
-        super();
     }
 
-    public GameEntity(Long id, String name) {
-        super(id);
+    public GameEntity(String name) {
         this.name = name;
     }
 
@@ -22,4 +33,12 @@ public class GameEntity extends BaseEntity {
     public void setName(String name){
         this.name = name;
     }
+
+    public List<UserEntity> getUsers(){
+        return users;
+    }
+
+    public List<BookingEntity> getBookings(){
+        return bookings;
+    }
 }
diff --git a/demo/src/main/java/com/example/demo/games/service/GameService.java b/demo/src/main/java/com/example/demo/games/service/GameService.java
index 1549b86..91d14d7 100644
--- a/demo/src/main/java/com/example/demo/games/service/GameService.java
+++ b/demo/src/main/java/com/example/demo/games/service/GameService.java
@@ -19,7 +19,7 @@ public class GameService {
     }
 
     public List<GameEntity> getAll(){
-        return repository.getAll();
+        return repository.findAll();
     }
 
     public GameEntity get(long id){
diff --git a/demo/src/main/java/com/example/demo/tables/api/TableController.java b/demo/src/main/java/com/example/demo/tables/api/TableController.java
index e3c9099..a61c40b 100644
--- a/demo/src/main/java/com/example/demo/tables/api/TableController.java
+++ b/demo/src/main/java/com/example/demo/tables/api/TableController.java
@@ -3,7 +3,7 @@ package com.example.demo.tables.api;
 import com.example.demo.core.config.Constants;
 import com.example.demo.games.api.GameDTO;
 import com.example.demo.games.model.GameEntity;
-import com.example.demo.tables.model.TableEntity;
+import com.example.demo.tables.model.BookingEntity;
 import com.example.demo.tables.service.TableService;
 import com.example.demo.users.api.UserDTO;
 import com.example.demo.users.model.UserEntity;
@@ -25,7 +25,7 @@ public class TableController {
         this.modelMapper = modelMapper;
     }
 
-    private TableDTO toDTO(TableEntity entity) {
+    private TableDTO toDTO(BookingEntity entity) {
         return new TableDTO(
                 entity.getId(),
                 entity.getDescription(),
@@ -35,8 +35,8 @@ public class TableController {
                 entity.getGamers().stream().map(e -> modelMapper.map(e, UserDTO.class)).toList()
         );
     }
-    private TableEntity toEntity(TableDTO dto){
-        TableEntity entity = modelMapper.map(dto, TableEntity.class);
+    private BookingEntity toEntity(TableDTO dto){
+        BookingEntity entity = modelMapper.map(dto, BookingEntity.class);
         entity.setCreator(modelMapper.map(dto.getCreator(), UserEntity.class));
         entity.setGame(modelMapper.map(dto.getGame(), GameEntity.class));
         entity.setGamers(dto.getGamers().stream()
diff --git a/demo/src/main/java/com/example/demo/tables/model/TableEntity.java b/demo/src/main/java/com/example/demo/tables/model/BookingEntity.java
similarity index 67%
rename from demo/src/main/java/com/example/demo/tables/model/TableEntity.java
rename to demo/src/main/java/com/example/demo/tables/model/BookingEntity.java
index 90d19de..3503699 100644
--- a/demo/src/main/java/com/example/demo/tables/model/TableEntity.java
+++ b/demo/src/main/java/com/example/demo/tables/model/BookingEntity.java
@@ -3,22 +3,36 @@ package com.example.demo.tables.model;
 import com.example.demo.core.model.BaseEntity;
 import com.example.demo.games.model.GameEntity;
 import com.example.demo.users.model.UserEntity;
+import jakarta.persistence.*;
 
 import java.util.Date;
 import java.util.List;
 
-public class TableEntity extends BaseEntity {
+@Entity
+@Table(name = "booking")
+public class BookingEntity extends BaseEntity {
+    @Column(nullable = false, length = 500)
     private String description;
-    private Date date;
-    private UserEntity creator;
-    private GameEntity game;
-    private List<UserEntity> gamers;
 
-    public TableEntity() {
-        super();
+    @Column(nullable = false)
+    private Date date;
+
+    @ManyToOne
+    @JoinColumn(name = "creator_id")
+    private UserEntity creator;
+
+    @ManyToOne
+    @JoinColumn(name = "game_id")
+    private GameEntity game;
+
+    @ManyToMany(mappedBy = "book_user")
+    private List<UserEntity> users;
+
+    public BookingEntity() {
+
     }
-    public TableEntity(String description, Date date,
-                       UserEntity creator, GameEntity game, List<UserEntity> users){
+    public BookingEntity(String description,
+                         Date date){
         this.description = description;
         this.date = date;
     }
@@ -52,9 +66,9 @@ public class TableEntity extends BaseEntity {
     }
 
     public List<UserEntity> getGamers(){
-        return gamers;
+        return users;
     }
     public void setGamers(List<UserEntity> gamers){
-        this.gamers = gamers;
+        this.users = gamers;
     }
 }
diff --git a/demo/src/main/java/com/example/demo/tables/repository/TableRepository.java b/demo/src/main/java/com/example/demo/tables/repository/TableRepository.java
index 6d7bfa9..8394aa2 100644
--- a/demo/src/main/java/com/example/demo/tables/repository/TableRepository.java
+++ b/demo/src/main/java/com/example/demo/tables/repository/TableRepository.java
@@ -1,8 +1,8 @@
 package com.example.demo.tables.repository;
 
-import com.example.demo.tables.model.TableEntity;
+import com.example.demo.tables.model.BookingEntity;
 import org.springframework.data.repository.CrudRepository;
 
-public interface TableRepository extends CrudRepository<TableEntity, Long> {
+public interface TableRepository extends CrudRepository<BookingEntity, Long> {
 
 }
diff --git a/demo/src/main/java/com/example/demo/tables/service/TableService.java b/demo/src/main/java/com/example/demo/tables/service/TableService.java
index a5b68cc..634393e 100644
--- a/demo/src/main/java/com/example/demo/tables/service/TableService.java
+++ b/demo/src/main/java/com/example/demo/tables/service/TableService.java
@@ -2,14 +2,11 @@ package com.example.demo.tables.service;
 
 import com.example.demo.core.error.NotFoundException;
 import com.example.demo.games.service.GameService;
-import com.example.demo.tables.model.TableEntity;
+import com.example.demo.tables.model.BookingEntity;
 import com.example.demo.tables.repository.TableRepository;
-import com.example.demo.users.model.UserEntity;
 import com.example.demo.users.service.UserService;
-import jakarta.validation.OverridesAttribute;
 import org.springframework.stereotype.Service;
 
-import java.util.Date;
 import java.util.List;
 import java.util.Optional;
 
@@ -25,16 +22,16 @@ public class TableService {
         this.gameService = gameService;
     }
 
-    public List<TableEntity> getAll(){
+    public List<BookingEntity> getAll(){
         return repository.getAll();
     }
 
-    public TableEntity get(Long id){
+    public BookingEntity get(Long id){
         return Optional
                 .ofNullable(repository.get(id))
                 .orElseThrow(() -> new NotFoundException(id));
     }
-    public TableEntity create(TableEntity entity){
+    public BookingEntity create(BookingEntity entity){
         entity.setCreator(
                 entity.getCreator() == null ?
                         entity.getCreator() :
@@ -55,8 +52,8 @@ public class TableService {
         return repository.create(entity);
     }
 
-    public TableEntity update(Long id, TableEntity entity){
-        final TableEntity existEntity = get(id);
+    public BookingEntity update(Long id, BookingEntity entity){
+        final BookingEntity existEntity = get(id);
 
         existEntity.setDate(entity.getDate() == null ? existEntity.getDate() : entity.getDate());
         existEntity.setDescription(
@@ -84,7 +81,7 @@ public class TableService {
         return repository.update(existEntity);
     }
 
-    public TableEntity delete(Long id){
+    public BookingEntity delete(Long id){
         return repository.delete(repository.get(id));
     }
 }
diff --git a/demo/src/main/java/com/example/demo/users/api/UserController.java b/demo/src/main/java/com/example/demo/users/api/UserController.java
index f8c9f72..6a85d35 100644
--- a/demo/src/main/java/com/example/demo/users/api/UserController.java
+++ b/demo/src/main/java/com/example/demo/users/api/UserController.java
@@ -7,14 +7,7 @@ import com.example.demo.users.model.UserEntity;
 import com.example.demo.users.service.UserService;
 import jakarta.validation.Valid;
 import org.modelmapper.ModelMapper;
-import org.springframework.web.bind.annotation.DeleteMapping;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.PutMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 @RequestMapping(Constants.API_URL + "/users")
@@ -43,7 +36,10 @@ public class UserController {
     @GetMapping
     public List<UserDTO> getAll()
     {
-        return userService.getAll().stream().map(this::toDTO).toList();
+        return userService.getAll()
+                .stream()
+                .map(this::toDTO)
+                .toList();
     }
 
     @GetMapping("/{id}")
@@ -52,13 +48,15 @@ public class UserController {
         return toDTO(userService.get(id));
     }
 
-    @PostMapping("/")
+    @PostMapping
     public UserDTO create(@RequestBody @Valid UserDTO dto) {
         return toDTO(userService.create(toEntity(dto)));
     }
 
     @PutMapping("/{id}")
-    public UserDTO update(@PathVariable(name = "id") long id, @RequestBody UserDTO dto) {
+    public UserDTO update(
+            @PathVariable(name = "id") long id,
+            @RequestBody UserDTO dto) {
         return toDTO(userService.update(id, toEntity(dto)));
     }
 
@@ -67,4 +65,36 @@ public class UserController {
     {
         return toDTO(userService.delete(id));
     }
+
+    @GetMapping("/{id}/subscription")
+    public List<SubscriptionDto> getUserSubscriptions(@PathVariable(name = "id") Long id) {
+        return userService.getUserSubscriptions(id).stream()
+                .map(this::toSubscriptionDto)
+                .toList();
+    }
+
+    @PostMapping("/{id}/subscription")
+    public List<SubscriptionDto> enableUserSubscriptions(
+            @PathVariable(name = "id") Long id,
+            @RequestParam(name = "subscriptions", defaultValue = "") List<Long> subscriptionsIds) {
+        return userService.enableUserSubscriptions(id, subscriptionsIds).stream()
+                .map(this::toSubscriptionDto)
+                .toList();
+    }
+
+    @DeleteMapping("/{id}/subscription")
+    public List<SubscriptionDto> disableUserSubscriptions(
+            @PathVariable(name = "id") Long id,
+            @RequestParam(name = "subscriptions", defaultValue = "") List<Long> subscriptionsIds) {
+        return userService.disableUserSubscriptions(id, subscriptionsIds).stream()
+                .map(this::toSubscriptionDto)
+                .toList();
+    }
+
+    @DeleteMapping("/{id}/subscription/all")
+    public List<SubscriptionDto> deleteAllUserSubscriptions(@PathVariable(name = "id") Long id) {
+        return userService.deleteAllUserSubscriptions(id).stream()
+                .map(this::toSubscriptionDto)
+                .toList();
+    }
 }
diff --git a/demo/src/main/java/com/example/demo/users/api/UserDTO.java b/demo/src/main/java/com/example/demo/users/api/UserDTO.java
index 5c5745e..a7fcfb4 100644
--- a/demo/src/main/java/com/example/demo/users/api/UserDTO.java
+++ b/demo/src/main/java/com/example/demo/users/api/UserDTO.java
@@ -1,6 +1,5 @@
 package com.example.demo.users.api;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
 import jakarta.validation.constraints.*;
 
 public class UserDTO {
@@ -8,12 +7,9 @@ public class UserDTO {
     @NotNull
     @Min(2)
     private String name;
-    @NotNull
+    @NotBlank
     @Min(4)
     private String login;
-    @NotNull
-    @Min(4)
-    private String password;
 
     public String getName() {
         return name;
@@ -28,12 +24,6 @@ public class UserDTO {
     public void setLogin(String login){
         this.login = login;
     }
-    public String getPassword() {
-        return password;
-    }
-    public void setPassword(String password){
-        this.password = password;
-    }
     public Long getId(){
         return id;
     }
diff --git a/demo/src/main/java/com/example/demo/users/model/UserEntity.java b/demo/src/main/java/com/example/demo/users/model/UserEntity.java
index ac977ee..06cb483 100644
--- a/demo/src/main/java/com/example/demo/users/model/UserEntity.java
+++ b/demo/src/main/java/com/example/demo/users/model/UserEntity.java
@@ -1,33 +1,26 @@
 package com.example.demo.users.model;
 
 import com.example.demo.core.model.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
 
 import java.util.Date;
 
+@Entity
+@Table(name = "users")
 public class UserEntity extends BaseEntity {
+    @Column(nullable = false, unique = true, length = 100)
     private String name;
+    @Column(nullable = false, unique = true, length = 50)
     private String login;
-    private String password;
-    private Date dateCreate;
-
     public UserEntity() {
-        super();
+
     }
 
-    public UserEntity(Long id, String name, String login, String password) {
-        super(id);
-        this.name = name;
+    public UserEntity(String login, String name) {
         this.login = login;
-        this.password = password;
-        this.dateCreate = new Date();
-    }
-
-    public UserEntity(Long id, String name) {
-        super(id);
         this.name = name;
-        this.dateCreate = new Date();
-        this.login = "";
-        this.password = "";
     }
 
     public String getName(){
@@ -44,17 +37,4 @@ public class UserEntity extends BaseEntity {
         this.login = login;
     }
 
-    public String getPassword(){
-        return password;
-    }
-    public void setPassword(String password){
-        this.password = password;
-    }
-
-    public Date getDateCreate(){
-        return dateCreate;
-    }
-    public void setDateCreate(Date dateCreate){
-        this.dateCreate = dateCreate;
-    }
 }
diff --git a/demo/src/main/java/com/example/demo/users/repository/UserRepository.java b/demo/src/main/java/com/example/demo/users/repository/UserRepository.java
index 49d2fd9..748f6a6 100644
--- a/demo/src/main/java/com/example/demo/users/repository/UserRepository.java
+++ b/demo/src/main/java/com/example/demo/users/repository/UserRepository.java
@@ -2,6 +2,9 @@ package com.example.demo.users.repository;
 
 import com.example.demo.users.model.UserEntity;
 import org.springframework.data.repository.CrudRepository;
-public interface UserRepository extends CrudRepository<UserEntity, Long> {
 
+import java.util.Optional;
+
+public interface UserRepository extends CrudRepository<UserEntity, Long> {
+    Optional<UserEntity> findByLoginIgnoreCase(String login);
 }
diff --git a/demo/src/main/java/com/example/demo/users/service/UserService.java b/demo/src/main/java/com/example/demo/users/service/UserService.java
index 446e59d..338dafe 100644
--- a/demo/src/main/java/com/example/demo/users/service/UserService.java
+++ b/demo/src/main/java/com/example/demo/users/service/UserService.java
@@ -4,11 +4,13 @@ import com.example.demo.core.error.NotFoundException;
 import com.example.demo.users.model.UserEntity;
 import com.example.demo.users.repository.UserRepository;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.awt.event.ItemEvent;
 import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
+import java.util.stream.StreamSupport;
 
 @Service
 public class UserService {
@@ -17,8 +19,16 @@ public class UserService {
         this.repository = repository;
     }
 
-    public List<UserEntity> getAll(){
-        return repository.getAll();
+    private void checkLogin(String login) {
+        if (repository.findByLoginIgnoreCase(login).isPresent()) {
+            throw new IllegalArgumentException(
+                    String.format("User with login %s is already exists", login));
+        }
+    }
+
+    @Transactional(readOnly = true)
+    public List<UserEntity> getAll() {
+        return StreamSupport.stream(repository.findAll().spliterator(), false).toList();
     }
 
     public UserEntity get(Long id){
@@ -26,21 +36,29 @@ public class UserService {
                 .ofNullable(repository.get(id))
                 .orElseThrow(() -> new NotFoundException(id));
     }
-    public UserEntity create(UserEntity entity){
-        return repository.create(entity);
+    @Transactional
+    public UserEntity create(UserEntity entity) {
+        if (entity == null) {
+            throw new IllegalArgumentException("Entity is null");
+        }
+        checkLogin(entity.getLogin());
+        repository.save(entity);
+        return repository.save(entity);
     }
 
-    public UserEntity update(Long id, UserEntity entity){
-        final UserEntity existEntity = get(id);
-
-        existEntity.setName(entity.getName().isEmpty() ? existEntity.getName() : entity.getName());
-        existEntity.setLogin(entity.getLogin().isEmpty() ? existEntity.getLogin() : entity.getLogin());
-        existEntity.setPassword(entity.getPassword().isEmpty() ? existEntity.getPassword() : entity.getPassword());
-
-        return repository.update(existEntity);
+    @Transactional
+    public UserEntity update(long id, UserEntity entity) {
+        final UserEntity existsEntity = get(id);
+        checkLogin(entity.getLogin());
+        existsEntity.setLogin(entity.getLogin());
+        repository.save(existsEntity);
+        return existsEntity;
     }
 
-    public UserEntity delete(Long id){
-        return repository.delete(repository.get(id));
+    @Transactional
+    public UserEntity delete(long id) {
+        final UserEntity existsEntity = get(id);
+        repository.delete(existsEntity);
+        return existsEntity;
     }
 }