private async Task <string> CheckPinAsync(string text) { try { int c; var isInt = int.TryParse(text, out c); if (!isInt) { return(AppResources.ErrorOSSAuthNotNumber); } if (c < 0) { return(AppResources.ErrorOSSAuthPositive); } var r = await rc.OSSCheckPin(text); return(r.Error); } catch (Exception ex) { return(AppResources.ErrorOSSAuthPin); } }