Best way to authenticate requests

I am trying to figure out the best way to authenticate a request before my schema executes the query/mutation. I was thinking I could use the @app.resolver('url') tag and create a function that would authenticate the request and then pass it to the graphqlview. Something like this:
```
@app.route('/graphql/')
def graphql():
print request.headers #AUTHENTICATE HERE
print request.data
return GraphQLView.as_view('/graphql/', schema=schema, graphiql=True)
```
But this doesn't work, can someone either show me what I am doing wrong here or give me a different way to authenticate the request? Thanks!

Start with the Flask route using @app.route('/graphql/') and the GraphQLView.as_view('/graphql/', schema=schema, graphiql=True) entry point. Trace how the request reaches the schema, then establish an authentication approach that runs before schema execution and verify that unauthenticated requests are rejected.

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