# Missing or invalid Authorization header

**URL:** <https://discuss.dwolla.com/t/missing-or-invalid-authorization-header/7384>\
**Category:** API Support\
**Created:** [August 25, 2021, 2:14am UTC](https://discuss.dwolla.com/t/missing-or-invalid-authorization-header/7384 "2021-08-25T02:14:30Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![kmoreira](https://sea2.discourse-cdn.com/dwolla/user_avatar/discuss.dwolla.com/kmoreira/32/2718_2.png) [@kmoreira](https://discuss.dwolla.com/u/kmoreira)\
**Post date:** [August 25, 2021, 12:50pm UTC](https://discuss.dwolla.com/t/missing-or-invalid-authorization-header/7384/2 "2021-08-25T12:50:55Z")

</div>

Hi @manny

Your `clientId` and `clientSecret` should be passed in to your “environment quick look” in Postman. You can find a guide [here](https://discuss.dwolla.com/t/using-postman-to-explore-and-debug-dwollas-v2-api/2758)

---

_[View the full topic](https://discuss.dwolla.com/t/missing-or-invalid-authorization-header/7384)._