Export variable in Mocha test

Question

To shed some light on what i'm trying to do is: after the test below is ran I get the report.json generated and the token I generated in the before hook and send the report to another api for it to process.

I have a mocha test in which I generate a token and I need this token generate to be shared with another js file.

var token = 'un_assigned';

describe('Comparison', function () {
  token = 'sin asignar';
  before(function (done) {
    getToken('app', function (response) {
      token = response.token;
      done();
    })
  });

  files.forEach(function (file) {
    it('Comparing ' + file, function (done) {
      const id = file.split('./screenshots/')[1];
      compare(file, id, token, function (response) {
        expect(response.TestPassed).to.be.true;
        done();
      });
    });
  });

  after(function (done) {
    done();

  })
});


exports.tokenApi = function getToken(){
  console.log(token);
  return token;
};

After the test is ran I need to pass the generate token to another JS file so I can process the mocha report. I tried using exports but when I call my function it calls my test. I'm a JS noob is there something im missing ?.