src/main/java/com/faf223/expensetrackerfaf/controller/UserController.java

@@ -12,6 +12,7 @@ import com.faf223.expensetrackerfaf.util.exceptions.UserNotCreatedException;
 import com.faf223.expensetrackerfaf.util.exceptions.UserNotFoundException;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.security.core.Authentication;
@@ -80,5 +81,14 @@ public class UserController {
 
         return ResponseEntity.ok(userMapper.toDto(users));
     }
+
+    @GetMapping("/delete/{username}")
+    @PreAuthorize("hasRole('ADMIN')")
+    public ResponseEntity<Void> deleteUserByUsername(@PathVariable String username) {
+
+        userService.deleteByUsername(username);
+
+        return ResponseEntity.status(HttpStatus.OK).build();
+    }
 }
 

src/main/java/com/faf223/expensetrackerfaf/model/User.java

@@ -38,11 +38,11 @@ public class User {
     //    @NotEmpty(message = "Password must not be empty")
         private String password;
 
-    @OneToMany(mappedBy = "user", fetch = FetchType.LAZY)
+        @OneToMany(mappedBy = "user", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
         @ToString.Exclude
         private List<Expense> expenses;
 
-    @OneToMany(mappedBy = "user", fetch = FetchType.LAZY)
+        @OneToMany(mappedBy = "user", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
         @ToString.Exclude
         private List<Income> incomes;
     }

src/main/java/com/faf223/expensetrackerfaf/repository/CredentialRepository.java

@@ -12,4 +12,6 @@ public interface CredentialRepository extends JpaRepository<Credential, Long> {
     Optional<Credential> findByEmail(String email);
 
     Optional<Credential> findByUser(User user);
+
+    void deleteByEmail(String email);
 }

src/main/java/com/faf223/expensetrackerfaf/repository/UserRepository.java

@@ -9,4 +9,6 @@ public interface UserRepository extends JpaRepository<User, String> {
     Optional<User> getUserByUserUuid(String userUuid);
 
     Optional<User> findByUsername(String username);
+
+    void deleteByUsername(String username);
 }

src/main/java/com/faf223/expensetrackerfaf/service/UserService.java

@@ -4,6 +4,7 @@ import com.faf223.expensetrackerfaf.model.Credential;
 import com.faf223.expensetrackerfaf.model.User;
 import com.faf223.expensetrackerfaf.repository.CredentialRepository;
 import com.faf223.expensetrackerfaf.repository.UserRepository;
+import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
@@ -36,4 +37,20 @@ public class UserService {
         }
         return null;
     }
+
+    @Transactional
+    public void deleteByUsername(String username) {
+
+        Optional<User> user = userRepository.findByUsername(username);
+        if (user.isPresent()) {
+
+            Optional<Credential> credential = credentialRepository.findByUser(user.get());
+
+            if (credential.isPresent()) {
+
+                credentialRepository.deleteByEmail(credential.get().getEmail());
+                userRepository.deleteByUsername(username);
+            }
+        }
+    }
 }