Make the guards of auth configurable

the guard of backend admin is not the default one for front user ,they share the common code
so

Lines 107 to 110 in 5e3a11b

    
           public static function getUserID() 
        
           { 
        
               return auth()->check() ? auth()->user()->id : null; 
        
           }

only get the default guard for front user, make it not working for the users of backend admin

See 616d27a

	public static function getUserID()
	{
	return auth()->check() ? auth()->user()->id : null;
	}