You should do a one-time setup of creating an "App password" in Bitbucket web UI with permissions to at least read your repositories and then use it in the command line.
How-to:
- Login to Bitbucket
- Click on your profile image
on the right (now on the bottom left)
- Choose
Bitbucket settings (now Personal settings)
- Under Access management section look for the App passwords option (https://bitbucket.org/account/settings/app-passwords/)
- Create an app password with permissions at least to Read under Repositories section. A password will be generated for you. Remember to save it, it will be shown only once!
- The username will be your Google username.