Totally stuck getting started. Constant 403 responses

[IamTheGorf]

Howdy all. I'm trying to get started with some API work on my PAN instances in AWS. I walked through the Getting Started guide for 8.0 and I created a user, assigned an Admin Profile to it that had API access, and then generated a key.  Seems pretty simple but no matter what I do, every request is coming back 403:

curl -k 'https://w.x.y.z//api/?type=op&cmd=<show><system><info></info></system></show>&key=LUFRPT0zTG5aOUEvbF...'
<response status = 'error' code = '403'><result><msg>Invalid credentials.</msg></result></response>

I've changed the password, I've recreated the user, i've redone the key after password changes. Nothing works. I have to be missing something simple.  Can anyone provide me some guidance?  I can't even figure out how to get to logfiles that would provide any debug output about why the user is getting rejected.

[nigelswift]

The name of the API key parameter is key, not api. So change the part preceding your key with &key= instead of &api=

[Sergey.Ivashkin-PL]

silly me!

I was looking for mistake in any other places, 

thank you!