48     protected $auth;  variable in Google\\Auth\\Credentials\\ServiceAccountJwtAccessCredentials
94         $this->auth = new OAuth2([
120         $scope = $this->auth->getScope();
125         $this->auth->setAudience($authUri);
139         $audience = $this->auth->getAudience();
140         $scope = $this->auth->getScope();
151         $access_token = $this->auth->toJwt();
154         $this->auth->setAccessToken($access_token);
164         return $this->auth->getCacheKey();
172         return $this->auth->getLastReceivedToken();
198         return $this->auth->getIssuer();