// add a new sport to sportData if does not exist
public Map<String, Sport> addSport(String sportName, String sportLocation) {
if (sportData.containsKey(sportName)) {
System.out.println("Sport already exists.");
} else {
Integer sportID = idGenerator.generateSportID(sportData);
Sport sport = new Sport(sportID, sportName, sportLocation);
sportData.put(sportName, sport);
}
return sportData;
}
