исправила модель юзера, добавила класс-перечисление ролей юзера

backend/src/main/java/com/example/backend/users/model/UserEntity.java

@@ -18,17 +18,16 @@ public class UserEntity extends BaseEntity {
     @Column(nullable = false, length = 5)
     private String password;
 
-    @Column(nullable = false)
-    private boolean isAdmin;
+    private UserRole role;
 
     public UserEntity() {
 
     }
 
-    public UserEntity(Integer id, String username, String password, boolean isAdmin) {
+    public UserEntity(Integer id, String username, String password) {
         this.username = username;
         this.password = password;
-        this.isAdmin = isAdmin;
+        this.role = UserRole.USER;
     }
 
     public String getUsername() {
@@ -47,17 +46,17 @@ public class UserEntity extends BaseEntity {
         this.password = password;
     }
 
-    public boolean getIsAdmin() {
-        return isAdmin;
+    public UserRole getRole() {
+        return role;
     }
 
-    public void setIsAdmin(boolean isAdmin) {
-        this.isAdmin = isAdmin;
+    public void setRole(UserRole role) {
+        this.role = role;
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(id, username, password, isAdmin);
+        return Objects.hash(id, username, password, role);
     }
 
     @Override
@@ -69,7 +68,7 @@ public class UserEntity extends BaseEntity {
         final UserEntity other = (UserEntity) obj;
         return Objects.equals(other.getId(), id) &&
                 Objects.equals(other.getUsername(), username) &&
-                Objects.equals(other.getIsAdmin(), isAdmin) &&
+                Objects.equals(other.getRole(), role) &&
                 Objects.equals(other.getPassword(), password);
     }
 }

backend/src/main/java/com/example/backend/users/model/UserRole.java

@@ -0,0 +1,16 @@
+package com.example.backend.users.model;
+
+import org.springframework.security.core.GrantedAuthority;
+
+public enum UserRole implements GrantedAuthority {
+    ADMIN,
+    USER;
+
+    private static final String PREFIX = "ROLE_";
+
+    @Override
+    public String getAuthority() {
+        return PREFIX + this.name();
+    }
+
+}