If you successfully install the FREESWITCH. In this post I will explain how to create the new user or modify the existing user.
Step 1. Locate the conf directory inside the freeswitch installed directory.
Step 2. change directory to default/
# cd conf/directory/default
This directory contain xml file related to default user extension to be used.
Step 3. To create a new user cp any of the file and name it with your desired extension.