If USAG exists in an org for a user accepting an invite, invite process fails

[glasschef]

Sometimes USAGs get created as part of an org association request that fails halfway through, and this hanging USAG conflicts when adding USAGs during invitations.

method=PUT; path=/users/someuser/association_requests/1bda9eda555383fab4f813b3d79491e7; status=500; req_id=8f5763af-03b8-4adc-b004-d0fdc3c3cfd1; org_name=someorg; msg={usag_creation_failed,{conflict,<<"duplicate key value violates unique cons"...>>}}

Can we just ignore duplicate USAGs for this scenario and complete the invite?

[marcparadise]

I'll need to research it - I think we can at least handle the automatic removal of it, if not actually verify that it's still safe to use the group already present.

[sean-horn]

Another possibly related case would be restoration of a preexisting user in a destination chef server chef/knife-ec-backup#72

[PrajaktaPurohit]

User org association is a multi step process, if at any point failure occurs before getting to the end of this process, we should be able to retry and deal with the leftover elements of the failure.