Allow AIOHTTPClient constructor to take user-provided ClientSession #1736
Description
Is your feature request related to a problem? Please describe.
The AIOHTTPClient constructor sets self._cached_session = None and uses the _session method to load a aiohttp.ClientSession into the field later. It would be nice to be able to provide the ClientSession or at least the TCPConnector so it could be customized, or share a connection pool, etc.
Describe the solution you'd like
No response
Describe alternatives you've considered
It is possible to set _cached_session manually after construction, but presumably this is an unstable interface.
Additional context
No response