public ActionResult <User> Create([FromBody] UserDto userDto) { if (userDto == null) { return(BadRequest()); } if (!ModelState.IsValid) { return(BadRequest(ModelState)); } if (_readRepository.GetByEmail(userDto.Email) != null) { return(BadRequest("The e-mail address is already used.")); } var user = _mapper.DtoToEntity(userDto); _writeRepository.Create(user); _writeRepository.SaveChanges(); return(CreatedAtRoute("GetByUserId", new { id = user.Id }, user)); }