code: public static String retrieveVendorId() {
      if (MapboxTelemetry.applicationContext == null) {
        return updateVendorId();
      }
  
      SharedPreferences sharedPreferences = obtainSharedPreferences(MapboxTelemetry.applicationContext);
      String mapboxVendorId = sharedPreferences.getString(MAPBOX_SHARED_PREFERENCE_KEY_VENDOR_ID, "");
      if (TelemetryUtils.isEmpty(mapboxVendorId)) {
        mapboxVendorId = TelemetryUtils.updateVendorId();
      }
      return mapboxVendorId;
    }
docs: Do not call this method outside of activity!!!