def update_member_data_in(self, leaderboard_name, member, member_data):
        '''
        Update the optional member data for a given member in the named leaderboard.

        @param leaderboard_name [String] Name of the leaderboard.
        @param member [String] Member name.
        @param member_data [String] Optional member data.
        '''
        self.redis_connection.hset(
            self._member_data_key(leaderboard_name),
            member,
            member_data)
Update the optional member data for a given member in the named leaderboard.

        @param leaderboard_name [String] Name of the leaderboard.
        @param member [String] Member name.
        @param member_data [String] Optional member data.