def get_session(session_store):
    """
        Get a session corresponding to the user and tenant from the given
        session store.

        :param session_store: The store of all sessions for all tenants for
            all plugins across all regions.
        :type session_store: :class:`mimic.session.SessionStore`

        :return: A session corresponding to the user and plugin data for a
            single tenant for all plugins across all regions.
        :rtype: :class:`mimic.session.SessionStore`
        """
