Rest API connection and OAuth 2.0 error

[peter_nbc]

Hi everyone

I am very new to APIs and I am trying to load data from my financial sytem to Qlik Cloud via an API.

I have followed all the steps on the systems developer portal, and I have made it work in Postman - so I am doing something right.
However, I can't seem to get it to connect in Qlik Cloud. I am following the attached guide, as this apparently is the way to handle refresh tokens in Qlik. So it is a two step process with first fetching the refresh token and then fetching the data - both using the REST connector.

I have attached the pictures of my configuration here. The response when I test connection is just: "HTTP protocol error 400 (Bad Request): {"error":"invalid_request"}"

Just some information that might help:
I don't really understand the "grant_type = client_credentials". Is that just standard? It doesn't mention this anywhere on the api documentation page. The only thing I can find there is this guide:

---
We exchange the code for a token, that we can use to interact with the API. This happens through a regular old POST request to https://connect.visma.com/connect/token. Here we send:

1. grant_type of authorization_code
2. our redirect_uri from our visma connect application settings
3. the code we got in step 3
4. client_id
5. client_secret

(Btw: this is the API documentation, if that helps in any way: https://developer.dinero.dk/documentation/tutorial/)

---

So maybe grant_type is "authorization_code"? I tried that too - but it doesn't work either.
They also mention a "code" in the documentation that they exchange for a token. I don't seen to be able to find a "code" anywhere in Postman or elsewhere.

Other than that I have these other variables in postman:

base_url
client_id
client_secret
auth_url
access_token_url
scopes
organizationld

Maybe I need to include som of these in the refresh token request as well? I am not sure at all though.

Hope someone can help.
Thanks in advance!