Hi @scott.glascott,
I have a couple of suggestions that will make this easier.
If you want tokens quickly and easily for testing, you should try out the authentication API debugger extension. It will allow you to easily obtain tokens directly in Auth0 UI.
If you want to use postman to get tokens for testing, you can temporarily turn on the password grant to exchange an email/password directly for tokens. Make sure you turn this off when you are done testing.
If you want to test out your current flows with postman, I’m also happy to work through it, it just tends to be more complex.