Feature summary (what you would like to be able to do and where): When the error "No GitLab accounts found for tool maintainers." is displayed, a sign-in link for the GitLab should be displayed.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution): When I tried to make a new repo I kept on getting this error, and it didn't help me with figuring out how to fix the problem. The fix required me to sign in to the GitLab owned by Wikimedia with my developer account.

Benefits (why should this be implemented?): This would make it easier for new devs for tools to get started.