document zeroconf based authentication properly

[eladyn]

In order to be able to use zeroconf based authentication, it is currently necessary to omit everything related to username or password in the configuration.

AFAICT, this is not really documented anywhere except for this wiki entry, which does barely go into details about this. Maybe I just haven't looked in the right places for this, but several others (#938, #948) seem to have trouble finding anything as well.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[eladyn]

I rebased this PR on the latest master. It would be great to get some feedback on this! 😃

[tomodachi]

Yes plz merge.

Just enabled this and It works great 👍🏽

Nice find @eladyn
Much better than running my hackish solution of running multiple spotifyd daemons with different users on the same device.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[eladyn]

Still relevant (I think).

[mas-4]

@eladyn I commented in the relevant issue (#948) and will repeat here: it seems you also need to have caching disabled for this to work. When cache_directory is set in the configuration the credentials of the first user to connect are cached and then anyone else who tries to connect causes the program to restart (using a systemd service with restart=always restartsec=12). It might be worth adding that to the documentation. It might be worth seeing if adding a "no_credential_caching" option to config is useful. I'm not a contributor to this project so just asking.

[eladyn]

@mas-4 Thanks for investigating this! I added a small note about the caching behaviour. It would be great if you could check whether this fits with your findings.

As for the no_credential_caching thing, I will add my thoughts on this in the linked issue.

[mas-4]

@eladyn I actually had cache_directory set which was also the problem. Might be worth noting both parameters.

[eladyn]

I currently can't find any mention of cache_directory, neither in the docs nor in the actual code. But it surely doesn't hurt to add it.

[SimonTeixidor]

Thanks!