XEP-0070 (XMPP) authentication
Seems like an OTP authentication, see https://linuxfr.org/news/authentifiez-vous-sans-mot-de-passe-grace-a-xmpp
Seems like an OTP authentication, see https://linuxfr.org/news/authentifiez-vous-sans-mot-de-passe-grace-a-xmpp