If you fail to log in 3 times in a row, you are sure that your username and password are correct, then you should stop logging in and contact customer service.
Ask them if there is a problem with their server or with your account. Remember not to keep trying after several failures, this may cause your account to be closed or cancelled.

gcloud auth application-default login | Cloud SDK …

Develop and run applications anywhere, using cloud-native technologies like containers, serverless, and service mesh. Hybrid and Multi-cloud Application Platform Platform for modernizing legacy apps and building new apps.

Difference between "gcloud auth application-default login …

gcloud auth application-default login This obtains your credentials via a web flow and stores them in ‘the well-known location for Application Default Credentials’ . Now any code/SDK you run will be able to find the credentials automatically.

Google Cloud Application Default Credentials – PHP – John …

 · This type is created by the CLI command gcloud auth application-default login. This type is similar to OAuth Client Secrets and includes the Client ID, Client Secret, and a Refresh Token. I believe, but I have not verified, that it would be easy to create tokens with this file. Type: service_account. This type is the normal service account JSON key file that you create and download from the Google …

Google Cloud Application Default Credentials – Python …

 · On Windows, this is %APPDATA%/gcloud/application_default_credentials.json. On other systems, $HOME/.config/gcloud/application_default_credentials.json. The default service account for credentials if the application is running on Compute Engine, App Engine, Kubernetes Engine, Cloud Functions, or Cloud Run.

Authentication on GCP with Docker: Application Default …

 · Applications running locally “magically” start working after you install the Google Cloud SDK and execute gcloud auth application default-login. Applications …

Authenticating as a service account | Authentication …

 · Create a service account key: In the Cloud Console, click the email address for the service account that you created. Click Keys . Click Add key, then click Create new key . Click Create. A JSON key file is downloaded to your computer. Click Close .