Because it says in the README:
> Authenticate: When prompted, sign in with your personal Google account. This will grant you up to 60 model requests per minute and 1,000 model requests per day using Gemini 2.5 Pro.
> For advanced use or increased limits: If you need to use a specific model or require a higher request capacity, you can use an API key: ...
When I have the Google AI Pro subscription in my Google account, and I use the personal Google account for authentication here, will I also have more requests per day then?
I'm currently wondering what makes more sense for me (not for CLI in particular, but for Gemini in general): To use the Google AI Pro subscription, or to use an API key. But I would also want to use the API maybe at some point. I thought the API requires an API key, but here it seems also the normal Google account can be used?