How to use the taskcluster-client-web.OIDCCredentialAgent function in taskcluster-client-web

constructor(options) {
    Object.assign(this, options);

    if (this.accessToken) {
      this.credentialAgent = new OIDCCredentialAgent({
        accessToken: this.accessToken,
        url: urls.api('login', 'v1', `/oidc-credentials/${this.oidcProvider}`)
      });
    }
  }