def member_data_for_in(self, leaderboard_name, member):
return self.redis_connection.hget(<EOL>self._member_data_key(leaderboard_name), member)<EOL>
Retrieve 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.
@return String of optional member data.