How can I enable the "Request user’s username" in OpenEdx admin for LTI configuration?

I wanted to know how open edx administrator enables “Request user’s username” for LTI configuration, it says in the documentation to contact edX partner manager. on the doc

Hi @Eyuel_Mulatu! It just happens that I had to enable this feature for a course recently. You need to go to the Django admin in the studio ( Then, in “XBlock configuration”, go to “Course edit lti fields enabled flags”. Then “Add course edit lti fields enabled flag”. (url: /admin/xblock_config/courseeditltifieldsenabledflag/add/)

There, paste your course ID and check “enable”.