google-ads-api: Invalid customer ID

Started getting this error. I tried multiple ads Id but it always gives me same error

GoogleAdsFailure {
  errors: [
    GoogleAdsError {
      error_code: [ErrorCode],
      message: "Invalid customer ID ''."
    }
  ],
  request_id: '5qJwTFD3XIuWfJKCXNfonw'
}

My Function to create client is as follow

auth(adsId) {
    adsId = adsId.replace(/-/g, '')

    try {
      return client.Customer({
        customer_id: adsId,
        login_customer_id: 'xxxxxxxxx', // Optionally provide a login-customer-id
        refresh_token: constants.refreshToken
      })
    } catch (exception) {
      utils.throwError(500, '', 'Error creating Ads auth')(exception)
    }
  }