public User ValidateUser(string userName, string password)
{
var encryptedPassword = _webHelper.EncryptToMd5(password);
var user = _unitOfWork.UserRepository.Table()
.FirstOrDefault(x => x.Username == userName && x.Password == encryptedPassword);
if (user != null)
{
user.LastActivity = System.DateTime.Now;
_unitOfWork.UserRepository.Update(user);
_unitOfWork.Save();
}
return(user);
}