Dear lazyverse, I've just read blog.prosody.im/great-invitati… and prosody.im/doc/modules/mod_inv… and I don't understand one thing: can this be used to generate an invite for an user that already exists and has been using the account for a while, but needs to reconfigure an xmpp client on a new phone?
of course they don't know their password, but I would have to reset it from prosodyctl anyway.
@valhalla Adding a new device via invitation is not currently a thing. Password resets links (which work almost the same as invitations) are.
Generate a password reset link with this command:
'prosodyctl mod_invites example.com --reset username'
I haven't extensively tested it with clients or invite UIs beyond Snikket, though. Feedback welcome 
@valhalla I add to the excellent @mattj explanation that both invitation things are very familiar to @snikket_im admins ...