Hi @Daniel_Clarke!
I can't even get the client credentials flow to work at all! I think I have everything set up correctly, but do not think the token is being set in the header. Do you mind sharing some screenshots of your API configuration?
I have some screenshots of my setup in this post: OAuth 2.0 Client Credentials Flow
For the time being, I am working around it by calling for a token refresh periodically and setting it as a variable in my header (just skipping OAuth completely)
Set my authentication token retrieval to run periodically... After it runs I save the token to a variable
Reference the variable in subsequent calls
