How to use the react-native-onesignal.registerForPushNotifications function in react-native-onesignal

it("must have registerForPushNotifications function", () => {
    OneSignal.registerForPushNotifications();
  });

it('must have registerForPushNotifications function', () => {
    OneSignal.registerForPushNotifications();
  });

invokeAuthRedirect(url) {
    let split = url.split('payload=');
    if (split.length === 2) {
      OneSignal.registerForPushNotifications();
      this._Manager.handleAuthPayload(decodeURIComponent(split[1]));
      this.checkAuthStatus();
    }
  }
  _onNavigationStateChange(event) {

onPress={() => {
              stats.userTurnedOnNotifications();
              if (Platform.OS === "ios") {
                OneSignal.registerForPushNotifications();
              }
              OneSignal.setSubscription(true);
              onContinue();
            }}
          />

onPress={() => {
                userTurnedOnNotifications();
                if (Platform.OS === "ios") {
                  OneSignal.registerForPushNotifications();
                }
                OneSignal.setSubscription(true);
                this.onContinue();
              }}
            />

onPress={() => {
                  if (Platform.OS === "ios") {
                    OneSignal.registerForPushNotifications();
                  }
                  OneSignal.setSubscription(true);
                  this.setState({
                    areNotificationsOn: true,
                  });
                  stats.userTurnedOnNotifications();
                }}
              />