Admin API: permit retrieving user activation status
In admin API we support /api/pleroma/admin/activation_status/:nickname
via PUT method to set user activation status. Adding a GET method to this to retrieve current status would be welcome.
There is a /api/pleroma/admin/users
endpoint to search for users which includes the deactivated
bool, but that relies on user search and getting it to return a single user reliably might be tricky.