We already build teams and roles in Github, so it is problematic to then rebuild this information in POEditor and keep it up to date.
It would be nice to have team support in POEditor
(https://poeditor.uservoice.com/forums/171919-general/suggestions/3663140-group-contributors-into-teams), but I would also be happy to allow all users in a github team to automatically be given access to all translation languages, or let them choose their own languages.