[Python] How to consume the Github GraphQL API using Python?

I want to access details from Github using Github GraphQl v4 API. I found Graphene library, but I'm not sure how to authenticate with a personal access token in Python.
I tried to search on Google but couldn't found any example. It's Python library that can create graphical schema's and are not for consuming them, I tried with `requests' but failed. How can i authenticate and can find list of repositories?

I have used Github GraphQl explorer to find list of repositories via this code:

viewer {
repositories(first: 30) {
totalCount
pageInfo {
hasNextPage
endCursor
}
edges {
node {
name
}
}
}

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