OAuth 2.0 API Requests

Hi team

I'm having an issue while trying to pull data from Survey Monkey Apply, through their OAuth2.0 API

I have generated the OAuth2 credentials through Survey Monkey Apply which creates:

Client ID: xxx

Client Secret: xxx

Refresh Token: xxx

Access Token: xxx
Access Token Scope: admin

Upon trying to create a new data source, selecting feeds and JSON I enter the endpoint URL from SMA from their documentation https://connect.smapply.io/pages/authentication.html and if I use the grant type "authorization code" I get a pop-up screen with an output from the database.

Authorization Code Ouput

However, I am unable to click next or progress from here.

When reading the https://connect.smapply.io/pages/authentication.html documentation it suggests that the only way to authenticate is via the "refresh token" grant type. However, when I try this I get an authentication issue.

Token Refresh Issue

This is the first time I am working with an OAuth2.0 API in Zoho Analytiocs and am unsure if I am missing a step.

Do I need to be doing somekind of post request to authenticate against the API first to get a new token?