Default Credentials in Google App Engine: Invalid Credentials error
问题 I followed the tutorial on https://developers.google.com/identity/protocols/application-default-credentials to use the default credentials in my application on the google app engine. However, when running the app locally, I get a 401 error (invalid Credentials) com.google.api.client.googleapis.json.GoogleJsonResponseException: 401 OK { "code" : 401, "errors" : [ { "domain" : "global", "location" : "Authorization", "locationType" : "header", "message" : "Invalid Credentials", "reason" :