/**
  * Check rules for ComicVine API key.
  *
  * @param \ComicAPI\Tokens\TokenInterface $value Instance of Token.
  *
  * @return bool
  */
 protected function validComicVine(TokenInterface $value)
 {
     $valid = new Rules\AllOf(new Rules\Length(40), new Rules\StringType());
     if ($valid->validate($value->getToken()) === false) {
         return false;
     }
     return true;
 }