FormatException in getUserByEmail Method about dart_firebase_admin HOT 2 CLOSED

@internal
  UserMetadata.fromResponse(
    auth1.GoogleCloudIdentitytoolkitV1UserInfo response,
  )   : creationTime = DateTime.fromMillisecondsSinceEpoch(
          int.parse(response.createdAt!),
        ),
        lastSignInTime = response.lastLoginAt.let((lastLoginAt) {
          return DateTime.fromMillisecondsSinceEpoch(int.parse(lastLoginAt));
        }),
        lastRefreshTime = response.lastRefreshAt.let((lastRefreshAt) {
          return DateTime.fromMillisecondsSinceEpoch(int.parse(lastRefreshAt));  // This is not an integer
        });