In 5 minutes running my first app? Well where do I get the auth token

You should read this…

Like most libraries, when you install the library you also install the example sketches, so in the IDE going to Examples > Blynk will give you examples for a wide variety of different boards and connection types.

It’s the Blynk IoT app on your phone.

I think you’ve skipped over a few of the key steps somehow. Did you start by creating your account at ?