Django alluth customisation- I want to add a sports option which multi checkbox selection

Django alluth customisation- I want to add a sports option which can have handball,volleyball,Soccer(5,7) and Basketball(5,7) all implemented with checkbox but I want sports field to hold all values.Please suggest how to implement that as I am struggling to customise alluth. Please find the image for reference as I want to implement that in Django.

Checkbox that needs to be implemented