[Python] Python GraphQL gql client authentication

I´m having a hard time using GraphQL with Python, because the suggested library (gql) is completely undocumented.

I found out that to provide the API URL, I need to pass an RequestsHTTPTransport object to Client like this:

client = Client(transport=RequestsHTTPTransport(
url='https://some.api.com/v3/graphql'))


but how to provide credentials like the Bearer Key?

I noticed that RequestsHTTPTransport also accepts an auth param, which is described as:

aram auth: Auth tuple or callable to enable Basic/Digest/Custom HTTP Auth
​

However, I still can not find out how to create this tuple or callable to work with a Bearer Key.

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