[BUG] TopDesk - Authorization issue

[For Neople]

**Describe the bug**
When connecting to a TopDesk operator account and trying to perform actions (using [pipedream demo](https://pipedream.com/connect/demo?app=topdesk&type=action&component=topdesk-update-incident)) we get an authorization issue with a 401 error return.

We are able to log in directly with the system and see incidents, Pipedream connection seems to be se up (username, Application token & URL are accepted as we get the message "Topdesk is connected"). But when we are trying to perform an action we get the response HTTP 401 Unauthorized with HTML error page message: “The request has not been applied because it lacks valid authentication credentials.”

**To Reproduce**
Steps to reproduce the behavior:

1. Go to https://pipedream.com/connect/demo?app=topdesk&type=action&component=topdesk-get-incidents
2. Connect to TopDesk environment
3. Set Max Results to 5

**Expected behavior**
A list of the 5 most recent incidents posted in TopDesk

**Additional context**
We are able to log in with the operator account and access these incidents. The application token is set up according to [TopDesk's documentation](https://docs.topdesk.com/nl/api-account.html#UUID-e5635a68-a53a-c704-5f81-bb5f60c22a99_UUID-3e6dcdf9-dcba-7a36-b4bc-c9aa11851377). Looks like the API connection has no authorization.