* @param String email - The email dress of the user who made the call (Used to get the game, and to exclude that user from an "Others" filter.
* @return ScriptSessionFilter newFilter - the created filter.
*/
private ScriptSessionFilter createFilter(final String filterType, final String email) {
final Game game = SessionTracker.getSessionTracker().getGameTracker().getGameWithUserInIt(email);
ScriptSessionFilter newFilter = null;
if ("Game".equals(filterType)) {
newFilter = new GameSessionFilter(game);
} else if ("Others".equals(filterType)) {
newFilter = new OtherPlayersInGameSessionFilter(game, email);
}