loadAchievements
Call this method and subscribe to the emitted signal to receive the list of the game achievements in JSON format. The JSON received from the com.jacobibanez.plugin.android.godotplaygameservices.signals.AchievementsSignals.achievementsLoaded signal contains a representation of the com.google.android.gms.games.achievement.Achievement class.
Parameters
forceReload
If true, this call will clear any locally cached data and attempt to fetch the latest data from the server.