Fixed error with user creation

BeReadyBackend/Endpoints/Users/CreateUserEndpoint.cs

@@ -1,13 +1,18 @@
 using BeReadyBackend.DTO.Users;
 using BeReadyBackend.Models;
 using BeReadyBackend.Repositories;
+using BeReadyBackend.Specifications.RandomChallenges;
 using BeReadyBackend.Specifications.Users;
 using FastEndpoints;
 using PasswordGenerator;
 
 namespace BeReadyBackend.Endpoints.Users;
 
-public class CreateUserEndpoint(UsersRepository usersRepository, AutoMapper.IMapper mapper) : Endpoint<CreateUserDto>
+public class CreateUserEndpoint(
+    UsersRepository usersRepository,
+    RandomChallengesRepository randomChallengesRepository,
+    UserRandomChallengesRepository userRandomChallengesRepository,
+    AutoMapper.IMapper mapper) : Endpoint<CreateUserDto>
 {
     public override void Configure()
     {
@@ -33,6 +38,18 @@ public class CreateUserEndpoint(UsersRepository usersRepository, AutoMapper.IMap
         user.Password = BCrypt.Net.BCrypt.HashPassword(req.Password + salt);
 
         await usersRepository.AddAsync(user, ct);
+
+        RandomChallenge? randomChallenge = await randomChallengesRepository.SingleOrDefaultAsync(new GetRandomChallengeByDateSpec(), ct);
+        if (randomChallenge is not null)
+        {
+            UserRandomChallenge userRandomChallenge = new()
+            {
+                UserId = user.Id,
+                RandomChallengeId = randomChallenge.Id
+            };
+            await userRandomChallengesRepository.AddAsync(userRandomChallenge, ct);
+        }
+        
         await Send.NoContentAsync(ct);
     }
 }