[Freeswitch-users] How can I use an external database to create new users?

Hi, I'm thinking to create a web application to create, edit and delete users in a simpler way than creating XML by hand but I don't find information about it. I've seen something about the module "mod_xml_curl" but I'm not sure how it interacts with the database nor if it's necessary some additional module more. I would like to use MySQL or postgreSQL, does anyone know how you can do it or some tutorial or reference application? Thanks, José D.