Accept GCP console invitation when email is not arriving

It sometimes happens that GCP does not send invitation emails when adding new users to the project.

You can use the following template to obtain the invitation URL.

https://console.cloud.google.com/invitation?project=<project-id>&account=<invited-email>&memberEmail=<invited-email>

If you are logged in using multiple accounts in the same browser.

https://console.cloud.google.com/invitation?project=<project-id>&account=<invited-email>&memberEmail=<invited-email>&authuser=2