This module allows you to authenticate against an Joomla database.
SQL connection paramaters are identical to those of SQL storage except for an additional ‘prefix’ parameter that defaults to ‘jos_’._
authentication = "joomla"
sql = { -- See documentation for SQL storage
    driver = "MySQL";
    database = "joomla";
    host = "localhost";
    username = "prosody";
    password = "secretpassword";
    prefix = "jos_";
}
Prosody 0.8+
With the plugin installer in Prosody 0.12 you can use:
sudo prosodyctl install --server=https://modules.prosody.im/rocks/ mod_auth_joomla
          For earlier versions see the documentation for installing 3rd party modules