How to change the request method from POST to GET?

I created a custom oauth2 api and when I get the token
At that time, the service provider provided a GET request

, so when I connected to the request, an error 404 occurred
, and the “code” parameter on the server needs to be placed in the query, so how should I set it here?

How are you trying to connect to this API?

You could use a HTTP Request node. In this node you can select GET from the drop down at the top the the node.