/**
  * Disables the access token
  *
  * @return void
  */
 public function revokeAccessToken()
 {
     //Access Token
     $accessToken = $this->getApp()->getAccessToken();
     //Request
     $request = new DropboxRequest("POST", "/auth/token/revoke", $accessToken);
     // Do not validate the response
     // since the /token/revoke endpoint
     // doesn't return anything in the response.
     // See: https://www.dropbox.com/developers/documentation/http/documentation#auth-token-revoke
     $request->setParams(['validateResponse' => false]);
     //Revoke Access Token
     $response = $this->getClient()->sendRequest($request);
 }