invalid_grant when using refresh token

[Gert-Jan van der Kamp]

Hi, 

I get a 400 with message "error": "invalid_grant" when trying to use the refresh token I got with the previous login. 

Here is my request :

POST https://connect.visma.com/connect/token HTTP/1.1
Accept: application/json
Content-Type: application/x-www-form-urlencoded
Host: connect.visma.com
Content-Length: 127
Expect: 100-continue

grant_type=refresh_token&refresh_token=6474**F1A6&client_id=isv_xlconnect

That form content seem to align with the docs except for the secret, but this app is PKCE.. 

Any idea what might be causing this? Can you see more details in the log? 

Regards Gert-Jan

[Gert-Jan van der Kamp · Accepted solution]

Was able to fix by setting the "Refresh Token usage" to "One Time" to roll over the Refresh token every time. Think the "Re Use" setting has a bug. 

[Yıldırım]

Hello, could you please report this to channel: VNI-Support@visma.com including developersupport@visma.com in the cc ? 

Thanks.