public async Task <int> SaveUserPreference(PreferenceType preferenceType, string username, string bundle)
{
var context = Context as DwhDashboardContext;
var preferences = context.UserPreferences.Where(x => x.UserName.ToLower() == username.ToLower()).ToList();
context.UserPreferences.RemoveRange(preferences);
await context.SaveChangesAsync();
var userPreference = UserPreference.Create(username, preferenceType, bundle);
context.UserPreferences.Attach(userPreference);
return(await context.SaveChangesAsync());
}