Inserting EF Code-first seed data only once

In my EF code-first MVC application, I am seeding a SuperUser base data. Later on, It's value can be changed from the application interface.

But the problem I am facing - this seed data refreshes every time while I run the application. I don't want this reset. Is there any way to avoid this?

//This is my DatabaseContext.cs -
public partial class DatabaseContext : DbContext
{
    public DatabaseContext() : base("name=EntityConnection")
    {
       Database.SetInitializer(new MigrateDatabaseToLatestVersion<DatabaseContext, Migrations.Configuration>()); 
    }
}

//This is my Configuration.cs-
internal sealed class Configuration : DbMigrationsConfiguration<DatabaseContext>
{
    public Configuration()
    {
        AutomaticMigrationsEnabled = true;
        AutomaticMigrationDataLossAllowed = false;
    }

    protected override void Seed(DatabaseContext context)
    {
        User user = new User()
            {
                UserId = 1,
                EmailAddress = "xyz@abc.com",
                LoginPassword = "123",                
                CurrentBalance = 0,
            };

        context.Users.AddOrUpdate(user);
    }
}