# Issue with POST /token

**URL:** <https://devforum.okta.com/t/issue-with-post-token/4633>\
**Category:** OAuth/OIDC\
**Created:** [March 27, 2019, 1:15am UTC](https://devforum.okta.com/t/issue-with-post-token/4633 "2019-03-27T01:15:52Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![jayrc](https://avatars.discourse-cdn.com/v4/letter/j/5fc32e/32.png) [@jayrc](https://devforum.okta.com/u/jayrc)\
**Post date:** [March 27, 2019, 3:29pm UTC](https://devforum.okta.com/t/issue-with-post-token/4633/5 "2019-03-27T15:29:17Z")

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Hello @dragos,

I decoded the access\_token and it shows the issuer as “{org}.okta.com”. I tried the POST request again with the following URL: https://{org}.okta.com/oauth2/v1/token – but I’m receiving the following:

{  
“error”: “invalid\_client”,  
“error\_description”: “Client authentication failed. Either the client or the client credentials are invalid.”  
}

In my authorization header, should I be using “Basic {accessToken}” or “Bearer {accessToken}”?

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_[View the full topic](https://devforum.okta.com/t/issue-with-post-token/4633)._