code: public static void register(Application application, String apptentiveKey, String apptentiveSignature) {
  		register(application, new ApptentiveConfiguration(apptentiveKey, apptentiveSignature));
  	}
docs: Must be called from the {@link Application#onCreate()} method in the {@link Application} object defined in your app's manifest.
  @param application Application object.
  @param apptentiveKey Apptentive Key.
  @param apptentiveSignature Apptentive Signature.