# OAuth refresh token errors

**URL:** <https://devforum.zoom.us/t/oauth-refresh-token-errors/116672>\
**Category:** Authentication\
**Created:** [August 30, 2024, 2:13pm UTC](https://devforum.zoom.us/t/oauth-refresh-token-errors/116672 "2024-08-30T14:13:03Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![app-niuco](https://avatars.discourse-cdn.com/v4/letter/a/35a633/32.png) [@app-niuco](https://devforum.zoom.us/u/app-niuco)\
**Post date:** [August 30, 2024, 2:13pm UTC](https://devforum.zoom.us/t/oauth-refresh-token-errors/116672/1 "2024-08-30T14:13:03Z")

</div>

**API Endpoint(s) and/or Zoom API Event(s)**  
`https://zoom.us/oauth/token`

**Description**  
Good morning!

Today (8/30/2024) we received OAuth refresh token errors for several users that use our App.

Until yesterday (8/29/2024) they were working normally, Detail: we have 8 token first retrieved on May 2024 or before, and one on 08/02/2024 that works perfectly.

Furthermore, our app refreshes all tokens in a daily basis to guarantee that them are not expired.

Could you help me solve this problem?

**Error?**  
Invalid token

**How To Reproduce**

_ **1. Request URL / Headers** _  
_URL_  
`https://zoom.us/oauth/token`

_Header:_  
`Authorization`: `Basic {base64(clientId:clientSecret)}`

_Body:_  
`grant_type`: `refresh_token`

_ **2. Authentication method or app type** _  
Api Key

_ **3. Errors** _

```auto
{
    "reason": "Invalid Token!",
    "error": "invalid_grant"
}

```

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<div class="post-metadata">

**Author:** ![ojus.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/ojus.zoom/32/734_2.png) [@ojus.zoom](https://devforum.zoom.us/u/ojus.zoom)\
**Post date:** [August 30, 2024, 4:00pm UTC](https://devforum.zoom.us/t/oauth-refresh-token-errors/116672/2 "2024-08-30T16:00:14Z")

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@app-niuco is the app uninstalled by the user?

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<div class="post-metadata">

**Author:** ![app-niuco](https://avatars.discourse-cdn.com/v4/letter/a/35a633/32.png) [@app-niuco](https://devforum.zoom.us/u/app-niuco)\
**Post date:** [August 30, 2024, 5:21pm UTC](https://devforum.zoom.us/t/oauth-refresh-token-errors/116672/3 "2024-08-30T17:21:18Z")

</div>

No, they continue using the app.

The problem is this invalid token. It was working normally yesterday.

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<div class="post-metadata">

**Author:** ![ojus.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/ojus.zoom/32/734_2.png) [@ojus.zoom](https://devforum.zoom.us/u/ojus.zoom)\
**Post date:** [September 4, 2024, 10:34pm UTC](https://devforum.zoom.us/t/oauth-refresh-token-errors/116672/4 "2024-09-04T22:34:44Z")

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Can you ask the users to reinstall the app? This could have possibly happened because the latest value of the refresh token wasnt saved.