You can also do this

Iam

Making a block breaking game with React? \s

Then imo it should be

GitHub(
fetcher: (req: Request) => Promise<Response>,
clientId,
clientSecret
)

instead of passing an object for the first parameter

I think the fetch API is pretty standard and justify not having to dep inject the fetch everytime. But it is still a great DX to have it override the built in fetcher.

interface options: {
fetch?(request: Request): Promise<Response>
}
const gitHub = new GitHub(clientId, clientSecret, { fetch })

They are not that hard if you think about it