public function email_confirmation($token)
 {
     //find verification info
     $user_verification = UserVerification::where('verification_token', $token);
     if ($user_verification->count()) {
         $user_verification = $user_verification->first();
         //find user
         $user = User::where('email', $user_verification->email)->first();
         //update user
         $user->is_active = 'active';
         $user->save();
         //delete verification info - optional
         $user_verification->delete();
         return 'Your account is activated. You can login from <a href="' . URL::to('/login') . '" target="_blank">here</a>';
     } else {
         return "Wrong URL or token";
     }
 }