Just some help if anyone else has trouble getting their app token, I was also receiving an ‘invalid client’ response despite having set the environment variables (client id/secret), and discovered that there is an “Initial Value” and “Current Value”. Somehow the current value is being cleared (maybe some startup process in the script?) - so check the environment variables with the “Quick peek” option in Postman to see if the current value is blank, and then update that value to proceed using Postman.
