Update custom Django authentication backend to get the credentials from the query strings

authentication_backend.py

import ...

class AuthenticationBackend(ModelBackend):

    def authenticate(self, request, username=None, password=None, **kwargs):
      
        # Get credentials from the query strings
        username = request.GET.get('username')
        password = request.GET.get('password')
        
        # Check that the user can authenticate in the LDAP using its username and password
        if get_LDAP_user(username, password) is None:
            return None
    
        ...