Current maintainer account for the Synapse client on PyPi is 'python_synapse_client'. This should be a real person (or a group - pandas, for example, has 'The PyData Development Team').
hey you're not a robot, yay
And updated the name in the owner account: https://pypi.org/user/python_synapse_client/
I added myself as maintainer: https://pypi.org/project/synapseclient/