/**
  * @param User $user
  * @return mixed
  */
 public function add(User $user)
 {
     $userID = $user->getUserID();
     $userName = $user->getUserName();
     $userPassword = $user->getPassword();
     $userFirst = $user->getFirstName();
     $userLast = $user->getLastName();
     $userEmail = $user->getEmail();
     $query = "INSERT INTO USERS(UserID, UserName, UserPassword, UserFirst, UserLast, UserEmail) VALUES('{$userID}', '{$userName}', '{$userPassword}', '{$userFirst}', '{$userLast}', '{$userEmail}') ";
     mysql_query($query) or die("Database access failed: " . mysql_error());
 }