public async void AddRateToUser(float rate)
{
if (ratingService.AddRateToUser(_selectedOffer.Driver.User.UserName, rate))
{
await Application.Current.MainPage.DisplayAlert("Login failed!", "Check if username and password match or correct function is chosen!", "OK");
}
else
{
await Application.Current.MainPage.DisplayAlert("Login failed!", "Check if username and password match or correct function is chosen!", "OK");
}
}
