add personal account deletion

ShoppingAssistantApi.Api/Mutations/UsersMutation.cs

@@ -2,6 +2,7 @@
 using ShoppingAssistantApi.Application.Models.Dtos;
 using ShoppingAssistantApi.Application.Models.Operations;
 using HotChocolate.Authorization;
+using ShoppingAssistantApi.Application.IServices;
 
 namespace ShoppingAssistantApi.Api.Mutations;
 
@@ -27,4 +28,12 @@ public class UsersMutation
     public Task<UserDto> RemoveFromRoleAsync(string roleName, string userId, CancellationToken cancellationToken,
         [Service] IUserManager userManager)
         => userManager.RemoveFromRoleAsync(roleName, userId, cancellationToken);
+
+    [Authorize]
+    public async Task<bool> DeletePersonalUserAsync(string guestId, CancellationToken cancellationToken,
+        [Service] IUsersService usersService)
+    {
+        await usersService.DeletePersonalUserAsync(guestId, cancellationToken);
+        return true;
+    } 
 }

ShoppingAssistantApi.Application/IServices/IUsersService.cs

@@ -12,4 +12,6 @@ public interface IUsersService
     Task<UserDto> GetUserAsync(string id, CancellationToken cancellationToken);
 
     Task UpdateUserAsync(UserDto dto, CancellationToken cancellationToken);
+
+    Task DeletePersonalUserAsync(string guestId, CancellationToken cancellationToken);
 }

ShoppingAssistantApi.Infrastructure/Services/UsersService.cs

@@ -59,4 +59,26 @@ public class UsersService : IUsersService
         entity.LastModifiedDateUtc = DateTime.UtcNow;
         await _repository.UpdateUserAsync(entity, cancellationToken);
     }
+
+    public async Task DeletePersonalUserAsync(string guestId, CancellationToken cancellationToken)
+    {
+        if (!Guid.TryParse(guestId, out var guid))
+        {
+            throw new InvalidDataException("Provided id is invalid.");
+        }
+
+        var entity = await _repository.GetUserAsync(u => u.GuestId == guid, cancellationToken);
+
+        if (entity.Id != GlobalUser.Id)
+        {
+            throw new UnAuthorizedException<User>();
+        }
+
+        if (entity == null)
+        {
+            throw new EntityNotFoundException<User>();
+        }
+
+        await _repository.DeleteAsync(entity, cancellationToken);
+    }
 }