xml parsing - django: how to get logged in user credantials from terminal and store it in xml -

I have a project that I have created using the Django-Rest Framework and I have an XML file that contains both The tag contains the username and password. Now I want to use the login user user name and password in XML automatically or use the XML terminal for the Thurgh Terminal and save it for the latest details. Please help me get in on this. thank you in advanced.