refactor user repo with helpers. better api validation etc.

backend-dart/lib/application/repository/user_repository_impl.dart

@@ -1,5 +1,5 @@
 import 'package:backend_dart/domain/entities/user.dart';
-import 'package:backend_dart/domain/interface/database.dart';
+import 'package:backend_dart/domain/data/database.dart';
 import 'package:backend_dart/domain/interface/error.dart';
 import 'package:backend_dart/domain/repository/user_repository.dart';
 import 'package:fpdart/fpdart.dart';
@@ -9,7 +9,7 @@ class UserRepositoryImpl implements UserRepository {
   UserRepositoryImpl(this.database);
 
   @override
-  TaskEither<IError, User> create(User user) {
+  TaskEither<IError, User> create(UserCreate user) {
     return database.users
         .generateId()
         .map(
@@ -29,7 +29,7 @@ class UserRepositoryImpl implements UserRepository {
   }
 
   @override
-  TaskEither<IError, User> update(User user) {
+  TaskEither<IError, User> update(UserUpdate user) {
     return database.users.update(user);
   }