How to create functions out of frisby requests, but still allow chaining

[snowe2010]

How can I create a function containing a call to frisby but then return the call before calling done so that I can chain?

ex:

module.exports = function login(state, headers, configurationPage) {
  return frisby.post(configurationPage.baseUrl + '/post',
    {
      blah: bloo
    })
    .then(function (res) {
    let json = res.json;
    headers.request = {};
    headers.request.headers = {};
    headers.request.headers['cookie'] = res.headers._headers['set-cookie'];
    headers.request.headers['Content-Type'] = 'application/json';
    state.user = state.user || {};
    state.user.userId = json.userId;
    state.user.tenantId = json.user.tenantId;
  });
};


describe("new applied user", function () {
  const headers = {};

  beforeAll(function (doneFn) {
    console.log("config page" + configurationPage);
    login(state, headers, configurationPage)
      .then(somethingElse(state, headers, configurationPage))
      .done(doneFn);

  });
});

[snowe2010]

And also, did you remove retry and waits from the v2 api? Those are pretty necessary functions for our team, as we use an event sourcing engine so we have to deal with eventual consistency