[BUG]: Adduser uses type hinting for finding members, breaking separate server functionality

[sebkuip]

Bot Version

v4.0.2

How are you hosting Modmail?

Other

Error Logs

N/A

Screenshots

How adduser does it (incorrect)

How contact does it (correct)

Additional Information

When a separate inbox server is used, the context for the adduser command will be in that server. This results in no members from the main server being found and thus adduser failing.