def add_discovery(self, device, address):
self.post('<STR_LIT>', params={'<STR_LIT>': device,<EOL>'<STR_LIT:address>': address})<EOL>
Add an entry to the discovery cache.

            Args:
                device (str): Device ID.
                address (str): destination address, a valid hostname or
                    IP address that's serving a Syncthing instance.

            Returns:
                None