public function generateSVNTokenForUser(PFUser $user, $comment)
 {
     $token = $this->generateRandomToken();
     $token_computed = $this->password_handler->computeUnixPassword($token);
     if ($this->token_dao->generateSVNTokenForUser($user->getId(), $token_computed, $comment)) {
         return $token;
     } else {
         return false;
     }
 }