class CustomLoginView(rest_auth_views.LoginView): def dispatch(self, *args, **kwargs): # sanitize username before running processes request = args[0] username = request.POST.get('username')

    if username:
        data_query_dict = request.POST
        new_data_query_dict = data_query_dict.copy()
        new_data_query_dict.setlist('username', [sanitize_username(data_query_dict['username'])])
        args[0].POST = new_data_query_dict

    return super().dispatch(*args, **kwargs)