73     protected $auth;  variable in Google\\Auth\\Credentials\\ServiceAccountCredentials
150         $this->auth = new OAuth2([
205         return $this->auth->fetchAuthToken($httpHandler);
213         $key = $this->auth->getIssuer() . ':' . $this->auth->getCacheKey();
214         if ($sub = $this->auth->getSub()) {
230             : $this->auth->getLastReceivedToken();
265         if ($this->auth->getScope()) {
288                 'private_key' => $this->auth->getSigningKey(),
289                 'client_email' => $this->auth->getIssuer(),
293                 $this->auth->getScope()
307         $this->auth->setSub($sub);
320         return $this->auth->getIssuer();
339         if ($this->auth->getAdditionalClaims()) {
347         return is_null($this->auth->getScope());