def get_member_stats(self):
        member_stats = {}
        for c in self.cards:
            # Test if c() is a Card instance and not Popin instance
            if isinstance(c(), comp.Card):
                for m in c().members:
                    username = m.username
                    member_stats[username] = member_stats.get(username, 0) + 1
        return member_stats
Return the most used users in this column
dataset/ETHPy150Open Net-ng/kansha/kansha/column/comp.py/Column.get_member_stats