If you tried using $(System.AccessToken) to authorize git downloading go module from you private Azure DevOps git repository, you could face with the following error:
fatal: unable to connect to dev.azure.com:
Official Microsoft documentation asks you to create PAT token for access git repoisitories:
But you can use $(System.AccessToken) of pipeline identity instead. So you can avoid storing PAT token and renew it on expiration.
Go to Project Settings => Pipelines => Settings and make sure you have "Protect access to repositories in YAML pipelines" checkbox disabled. It will allow pipeline identities access other git repositories:
Be sure *GOPRIVATE * environment variable set to dev.azure.com
After you added it you can execute the following commaind in your pipeline:
git config --global url."https://test:$(System.AccessToken)@dev.azure.com/<organization>/<project>/_git/<repo>".insteadOf "https://dev.azure.com/<organization>/<project>/<repo>"