[Freeswitch-users] Change registration information for SIP-Registrar via XML/RPC?

Hello, we want to use mod_pa as a softphone, that registers to a SIPregistrar. But the username and password need to be changed over time without restarting freeswitch. Currently we are using XML/RPC to control the call functions. So it would be best (if possible) to use it also for changing registration information. Is there any way to do this? Thanks in advance René