Proper Way To Perform Get Api Call With Api Key In Header?

I've never really attempted to try and write my own code that calls an API. I have some Python code that I created after discovering Python Requests library. However, I can't get

Solution 1:

If you are calling an API you need to send post :

r = requests.post(url, headers=headers)

Solution 2:

Are you sure you don't have to supply the API key something like this?

{'Auth': 'Token my_key'}

That's how most API's do it, but I can't find any reference to their API docs anywhere.