public static async Task<RestaurantContext> GetRestaurantContextAsync()
 {
     if(_restaurantContext == null)
     {
         _restaurantContext = new RestaurantContext();
         await _restaurantContext.InitializeContextAsync();
     }
     return _restaurantContext;
 }
        public static async Task <RestaurantContext> GetRestaurantContextAsync()
        {
            if (_restaurantContext == null)
            {
                _restaurantContext = new RestaurantContext();
                await _restaurantContext.InitializeContextAsync();
            }

            return(_restaurantContext);
        }