public async Task <bool> AcceptRental(Rental rental)
{
if (rental == null)
{
return(false);
}
rental.Accept();
await rolesService.AdmitRole(rental.Owner, RoleName.RentalOwner);
await notificationSystem.PushNotification(rental.OwnerId, StaticExpressions.RentalAccepted(rental.Name), NotificationType.Rental);
return(true);
}