Token Refresh Fails: `Missing required parameter: code`

[MitchTalmadge]

Which node are you reporting an issue on?

oauth2

What are the steps to reproduce?

1. Enable Implicit Flow

2. Set the required parameters for use with Google OAuth2 and Google Calendar:

   key	value
   grant_type	implicit_flow
   access_token_url	https://accounts.google.com/o/oauth2/token
   authorization_endpoint	https://accounts.google.com/o/oauth2/v2/auth
   client_id	xxxxxxx
   client_secret	xxxxxxx
   response_type	code
   access_type	offline
   prompt	select_account
   scope	https://www.googleapis.com/auth/calendar.events.readonly

3. Turn on "Force Token Refresh" (This is just so you don't have to wait for the token to expire. Another option is to just wait for a couple hours and trigger the oauth2 node again).

4. Obtain an OAuth2 code using the button in the config editor:

5. Trigger the node two times.

What happens?

The first time succeeds, the second time throws an error Missing required parameter: code. The first time is using the authorization_endpoint, and the second time is using access_token_url. The second request does not seem to include the code parameter. I wonder if it was not saved to the credentials object correctly?

Full error:

{
  "payload": 1719784227118,
  "topic": "",
  "_msgid": "xxxxxx",
  "oauth2Error": {
    "status": 400,
    "message": "Bad Request",
    "data": {
      "error": "invalid_request",
      "error_description": "Missing required parameter: code"
    },
    "headers": {
      "cache-control": "no-cache, no-store, max-age=0, must-revalidate",
      "date": "Sun, 30 Jun 2024 21:50:27 GMT",
      "pragma": "no-cache",
      "expires": "Mon, 01 Jan 1990 00:00:00 GMT",
      "content-type": "application/json; charset=utf-8",
      "vary": "Origin, X-Origin, Referer",
      "server": "scaffolding on HTTPServer2",
      "x-xss-protection": "0",
      "x-frame-options": "SAMEORIGIN",
      "x-content-type-options": "nosniff",
      "alt-svc": "xxxxxxx",
      "connection": "close",
      "transfer-encoding": "chunked"
    }
  }
}

What do you expect to happen?

Token refresh should include the code correctly.

Please tell us about your environment:

• [ ] Node-RED version: 4.0.1
• [ ] node.js version: Don't know
• [ ] npm version: Don't know
• [ ] Platform/OS: Home Assistant OS
• [ ] Browser: Arc Browser