Securing Flask-Admin with Flask-HTTPAUTH

So I have looked everywhere for this but I couldn't find an answer.

I have recently integrated flask-admin to my flask application, which is already, partly secured using flask-httpauth's basic authentication. I am using the @auth.verify_password decorator to verify the credentials using httpauth.

I tried following the examples about how to integrate flask-basicauth with flask-admin using custom Views but I couldn't find a method that asks for the user login as the basic_auth.challenge().

So here's the question, how could I fill this custom admin view to integrate httpauth?

class MyAdminIndexView(AdminIndexView):
    def is_accessible(self):
        if not auth.current_user():
            raise AuthException('Not authenticated.')
        else:
            return True
    def inaccessible_callback(self, name, **kwargs):
        # What can I put in place of this:
        return redirect(auth.challenge())

Or else, what's the alternative?

from Securing Flask-Admin with Flask-HTTPAUTH