Remind user to save token & key after device discovery in case cloud services are non-functional

[mill1000]

As apparent in #322, if the cloud services become non-functional a lot of users are left without functioning devices if they don't save their token and key.

Ideally, the config flow should display a message after discovery with these items so the user can save them.

[easonyan123]

can you please show me how to save the tokens and keys, thanks

[moxuec]

can you please show me how to save the tokens and keys, thanks

cat homeassistant/.storage/core.config_entries | grep midea_ac

[mill1000]

That's a good way for now. Or you can use the msmart-ng CLI.

Eventually I'll get HA to display them after configuration.