public override MembershipUser CreateUser()

in MySql.Web/src/MembershipProvider.cs [721:824]
94 lines of code
11 McCabe index (conditional complexity)

    public override MembershipUser CreateUser(string username, string password,
        string email, string passwordQuestion, string passwordAnswer,
        bool isApproved, object providerUserKey, out MembershipCreateStatus status)
    {
      //basis on MSDN documentation we should trim all the paramater values: http://msdn.microsoft.com/en-us/library/d8t4h2es%28v=vs.110%29.aspx
      TrimParametersValues(ref username, ref password, ref email, ref passwordQuestion, ref passwordAnswer);

      ValidatePasswordEventArgs Args = new ValidatePasswordEventArgs(username, password, true);
      OnValidatingPassword(Args);
      if (Args.Cancel)
      {
        status = MembershipCreateStatus.InvalidPassword;
        return null;
      }
      if (RequiresUniqueEmail && !String.IsNullOrEmpty(GetUserNameByEmail(email)))
      {
        status = MembershipCreateStatus.DuplicateEmail;
        return null;
      }

      ValidateQA(passwordQuestion, passwordAnswer);

      // now try to validate the password
      if (!ValidatePassword(password, "password", false))
      {
        status = MembershipCreateStatus.InvalidPassword;
        return null;
      }

      // now check to see if we already have a member by this name
      MembershipUser u = GetUser(username, false);
      if (u != null)
      {
        status = MembershipCreateStatus.DuplicateUserName;
        return null;
      }

      string passwordKey = GetPasswordKey();
      DateTime createDate = DateTime.Now;
      MySqlTransaction transaction = null;

      using (MySqlConnection connection = new MySqlConnection(connectionString))
      {
        try
        {
          connection.Open();
          transaction = connection.BeginTransaction();

          // either create a new user or fetch the existing user id
          long userId = SchemaManager.CreateOrFetchUserId(connection, username,
              app.EnsureId(connection), true);

          MySqlCommand cmd = new MySqlCommand(
              @"INSERT INTO my_aspnet_membership 
                        VALUES(@userId, @email, @comment, @password, @passwordKey, 
                        @passwordFormat, @passwordQuestion, @passwordAnswer, 
                        @isApproved, @lastActivityDate, @lastLoginDate,
                        @lastPasswordChangedDate, @creationDate, 
                        @isLockedOut, @lastLockedOutDate, @failedPasswordAttemptCount,
                        @failedPasswordAttemptWindowStart, @failedPasswordAnswerAttemptCount, 
                        @failedPasswordAnswerAttemptWindowStart)",
              connection);
          cmd.Parameters.AddWithValue("@userId", userId);
          cmd.Parameters.AddWithValue("@email", email);
          cmd.Parameters.AddWithValue("@comment", "");
          cmd.Parameters.AddWithValue("@password",
              EncodePassword(password, passwordKey, PasswordFormat));
          cmd.Parameters.AddWithValue("@passwordKey", passwordKey);
          cmd.Parameters.AddWithValue("@passwordFormat", PasswordFormat);
          cmd.Parameters.AddWithValue("@passwordQuestion", passwordQuestion);
          cmd.Parameters.AddWithValue("@passwordAnswer",
              EncodePassword(passwordAnswer, passwordKey, PasswordFormat));
          cmd.Parameters.AddWithValue("@isApproved", isApproved);
          cmd.Parameters.AddWithValue("@lastActivityDate", createDate);
          cmd.Parameters.AddWithValue("@lastLoginDate", createDate);
          cmd.Parameters.AddWithValue("@lastPasswordChangedDate", createDate);
          cmd.Parameters.AddWithValue("@creationDate", createDate);
          cmd.Parameters.AddWithValue("@isLockedOut", false);
          cmd.Parameters.AddWithValue("@lastLockedOutDate", createDate);
          cmd.Parameters.AddWithValue("@failedPasswordAttemptCount", 0);
          cmd.Parameters.AddWithValue("@failedPasswordAttemptWindowStart", createDate);
          cmd.Parameters.AddWithValue("@failedPasswordAnswerAttemptCount", 0);
          cmd.Parameters.AddWithValue("@failedPasswordAnswerAttemptWindowStart", createDate);

          int recAdded = cmd.ExecuteNonQuery();
          if (recAdded > 0)
            status = MembershipCreateStatus.Success;
          else
            status = MembershipCreateStatus.UserRejected;
          transaction.Commit();
        }
        catch (MySqlException e)
        {
          if (WriteExceptionsToEventLog)
            WriteToEventLog(e, "CreateUser");
          status = MembershipCreateStatus.ProviderError;
          if (transaction != null)
            transaction.Rollback();
          return null;
        }
      }

      return GetUser(username, false);
    }