protected function authClient(): ClientInterface
    {
        return new Client(new BasicAuth($this->clientId, $this->clientSecret), $this->auth_server);
    }
protected function authClient(): ClientInterface
    {
        return new Client(new BasicAuth($this->clientId, $this->clientSecret), $this->auth_server);
    }
protected function authClient ( ) : ClientInterface { return new Client ( new BasicAuth ( $ this -> clientId , $ this -> clientSecret ) , $ this -> auth_server ) ; }
Returns a pre-configured client for authorization API calls.

@return \Apigee\Edge\ClientInterface
Returns a pre - configured client for authorization API calls .