Ability to select the unlicensed user in Bitbucket user pickers

Issue Summary

Some customer wants to select the unlicensed user first, because they manage the license with checking user assignees and activities in Bitbucket via REST API.
So they wants to select the unlicensed user first in Project/Repository permissions, and then they grant the license to that user. In Jira/Confluence, this procedure works fine because these products are able to select the unlicensed user in the user picker.

This is reproducible on Data Center: yes

Expected Results

Provide ability to select the unlicensed user in Bitbucket user pickers as same as Jira/Confluence.

Actual Results

You can't select the unlicensed user in Bitbucket.

• Related materials
  • Stash 3.8 release notes
    • > Cleaner handling of unlicensed and unauthorized users
  • BSERV-7026 Limit @ mention list to only licensed users
  • BSERV-3584 Allow only licensed and authorised users to be reviewer

Workaround

Grant the Bitbucket license to that user first.