ngx-wit planner https://github.com/fabric8-services/fabric8-auth/blob/master/account/init_tenant.go#L41

collab.ts

  addCollaborators(spaceId: string, users: User[]): Observable<Response> {
    let url = this.spacesUrl + "/" + spaceId + '/collaborators';
    let payload = JSON.stringify({ data: users });
    return this.http
      .post(url, payload, { headers: this.headers })
      .catch((error) => {
        return this.handleError(error);
      });
  }