/**
  * @JMS\Groups({"client_metadata"})
  * @JMS\VirtualProperty
  * @JMS\SerializedName("client_secret")
  */
 public function getClientSecret()
 {
     if ($this->client_id === null && $this->client) {
         return $this->client->getClientSecret();
     }
     return $this->client_secret;
 }