public bool AssignUserCredentials(int userId, string userName, string password) { Users user = GetUserById(userId); if (user == null) { throw new NoEntryFoundException(userId, typeof(Users).Name); } Credentials existingCredentials = CredentialsRepository.FindByUserId(userId); if (existingCredentials != null) { throw new ExistingCredentialsFoundException(userId, existingCredentials.Id); } existingCredentials = CredentialsRepository.FindByUserName(userName); if (existingCredentials != null) { throw new ExistingCredentialsFoundException(userName); } HashedAndSaltedPassword hashAndSaltPassword = PasswordHelper.CryptPassword(password); Credentials newCredentials = new Credentials { UserId = userId, UserName = userName, PasswordHash = hashAndSaltPassword.PasswordHash, PasswordSalt = hashAndSaltPassword.PasswordSalt }; CredentialsRepository.Add(newCredentials); return(true); }