...
2.2 Configuration in Confluence
...
1. Go to Confluence Configuration → Include Bitbucket Cloud. You should then see the following page:
2. Add the Bitbucket credentials from above. To do that, click on
...
the
...
Add button. Note: the User/Team
...
name has to be identical with the User/Team ID from Bitbucket Cloud. It is useful to copy/paste the team name from the repository URL.
Example: 
...
3. Finished. You can now include files from Bitbucket into Confluence with the apps' macros.