ejabberd-mod-default-contacts 0.2020.10.21~dfsg0-4 (amd64 binary) in ubuntu hirsute

 This module allows for specifying one or more contacts that should be
 added to the user's roster automatically on successful registration
 (via "mod_register", or, for example, "ejabberdctl register").
 Note that no presence subscription is performed, and the rosters of
 the contacts are not modified.