public Task <Activity> Edit(long id, ActivityUpdate data)
        {
            Ensure.ArgumentNotNull(data, nameof(data));

            return(ApiConnection.Put <Activity>(ApiUrls.Activity(id), data));
        }
 public Task Delete(long id)
 {
     return(ApiConnection.Delete(ApiUrls.Activity(id)));
 }
 public Task <Activity> Get(long id)
 {
     return(ApiConnection.Get <Activity>(ApiUrls.Activity(id)));
 }