def event_legal(self, cuuid, euuid, event_data):
return True<EOL>
Determines whether or not the event is LEGAL or ILLEGAL. If the
        event is LEGAL, the Neteria server will execute the "event_execute"
        method. This method should be overridden in the child class, otherwise
        ALL events from the client will be considered LEGAL.

        Args:
          cuuid (string): The client's universally unique identifier (uuid).
          euuid (string): The event's universally unique identifier (uuid).
          event_data (any): Arbitrary data sent from the client.

        Returns:
          True if the event is LEGAL. False if the event was ILLEGAL.