Login with git client when Jira account is Microsoft authenticated

Hello

I just created Bitbucket account, my Atlasian account is Microsoft Login managed. When creating the Bitbucket it asked for git user name, but not password.

And when my git client (Fork) wants to log in then I do not have login for this git user name, and it does not take the Microsoft login.

I tried creating Application Key but that does not seem to work.

Is there any place where I set password for just the git user handle ?

Thanks