Custom apps - oauth - fail to connect

Hello everyone,
I am building a custom app using the following apis : API Documentation

I am struggling with the authentication using the APIs mentionned in the documentation.
When testing in Postman I used directly the Authorization tab to get the token (see the following picture) and it’s working I tested all the APIs :


But I don’t know how to do the same in make, these are the lines of code that I used to make the connection :

then this is the error that I get :

I tried to add the refresh also, like follow :

But I get an error even before running the module, I get an error when adding a new connection :

Can someone help ?
PS: it could be something very easy, I am new to creating custom apps and using oauth2.
Thank you in advance.

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