@geleeroyale of course! Here is what I updated in the
# Enable authentication.
# Enable guest access.
# Select authentication type: internal, jwt or ldap
# JWT auuthentication
# Application identifier.
# Application secret known only to your token.
# (Optional) Set asap_accepted_issuers as a comma separated list.
# (Optional) Set asap_accepted_audiences as a comma separated list.
Then I built a backend service which is able to generate a JWT token using the same information as defined in Jitsi. When a user wants to join a room, he first gets a JWT token from this new service and uses it in mobile or external API client.