use aiogoogle as default client manager

[dfguerrerom]

I just came across with this project: https://github.com/omarryhan/aiogoogle and it looks indeed very powerful to leverage the authentication and async calls to google APIS, in which case I could use for this project.

[dfguerrerom]

Even though aiogoogle is a very nice package to interact with google apis, the main authentication process that I'm gonna use is not compatible with it... my sessions will directly receive an access_token...