private async void BtnLoginUser_Click(object sender, System.EventArgs e)
    {
        string EmailU = txtEmailU.Text.ToString();
        string PasswordU = txtPwU.Text.ToString();
        var user = new ParseUser();
        try
        {
            if (string.IsNullOrEmpty(EmailU))
            {
                Toast.MakeText(this, "Please Enter Email", ToastLength.Long).Show();
                return;
            }
            else if (string.IsNullOrEmpty(PasswordU))
            {
                Toast.MakeText(this, "Please Enter Password", ToastLength.Long).Show();
                return;
            }
            else
            {
                ProgressDialog mDialog = new ProgressDialog(this);

                mDialog.SetTitle("Please Wait");
                mDialog.SetMessage("Loging");
                mDialog.SetCanceledOnTouchOutside(true);
                mDialog.SetProgressStyle(ProgressDialogStyle.Spinner);
                mDialog.Show();
                var user await ParseUser.LogInAsync(EmailU, PasswordU);
                if (user["emailVerified"] = true )
                {
                    StartActivity(typeof(MainActivity));
                }
                else
                {
                    Toast.MakeText(this, "Please Verify", ToastLength.Long).Show();
                    return;
                }

            }
        }
        catch (Exception ep)
        {
            Toast.MakeText(this, "Some Error Occured " + ep.Message, ToastLength.Long).Show();
        }