login.js

app.post('/v1/login', async (req, res) => {
  try {
    const response = await requestPromise.post({
      uri: `${API_BASE_URL}/api/oauth2/auth?${req.body.formQuery}`,
      body: req.body,
      json: true,
      strictSSL: false,
      resolveWithFullResponse: true,
      simple: false,
    });

    if (response.statusCode === 200) {
      return res
        .status(200)
        .header('set-cookie', loginResponse.headers['set-cookie'])
        .send();
    } else {
      return res
      .status(500)
      .json({ errorMessage: 'An unexpected  occured' });
    }
  } catch (error) {
    return res
      .status(500)
      .json({ errorMessage: 'An unexpected error occured' });
  }
})