Have credits in Flow (Google Labs) but cannot use them via API

So, I have Google AI Pro Subscription which gives me access to use Nano Banana Pro, Veo and all the latest models on FLOW. The thing is I want to integrate it with an app i am buidling and hence I generated an API key, I do have over 500 credits left but I cannot use them with the API. Can those credits be only used with Google Labs? and to use it via API I have to set up monthly billing?

Hi @Abhigyan
Welcome to the Google AI Forum!!!

Thank you for reaching out!
If you have any questions or require further clarification regarding the Gemini API or Google AI Studio, please feel free to reach out. If you have more questions related to Google Labs, there’s a Labs discord Google Labs.