System.ArgumentNullException:DatabaseSqlClient

Question

Hi Team

 

Who can help me, i am unable to launch my web application, i am getting database.sqlclient exception : login failed for user. Here is my logic below, this is on my AppStart folder(AuthConfig.cs);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using Microsoft.Web.WebPages.OAuth;
using WebMatrix.WebData;
namespace eNtsaPortalWebsiteProject
{
public class AuthConfig
{
public static void RegisterAuth()
{
WebSecurity.InitializeDatabaseConnection("MyString", "eNtsaMemberRegistrationDB", "UserId", "UserName", autoCreateTables: true);
}
}
}

I have so far try to grant the permission to allow for execution on my sql database, using the sql syntax below;

use eNtsaMemberRegistrationDB

 

go

grant all on TestUser to Users;

 

I am getting this error on my DB

 

The ALL permission is deprecated and maintained only for compatibility. It DOES NOT imply ALL permissions defined on the entity.