add authentication subcommand

[wolfv]

So far this is just a simple subcommand to store login information

[ruben-arts]

Not sure how to test this. I tried a private channel on prefix.dev but that does not seems to work, either because of prefix.dev or pixi. Error I get:

ERROR rattler_repodata_gateway::fetch: error=HTTP status client error (403 Forbidden) for url (https://repo.prefix.dev/ruben-arts/noarch/repodata.json)
ERROR rattler_repodata_gateway::fetch: error=HTTP status client error (403 Forbidden) for url (https://repo.prefix.dev/ruben-arts/linux-64/repodata.json)
error: failed to fetch repodata from channels

Caused by:
    HTTP status client error (403 Forbidden) for url (https://repo.prefix.dev/ruben-arts/noarch/repodata.json)

Those repodata jsons are indeed not available for me, even in the browser.

I added @wolfv @baszalmstra @tdejager to the channel so you should be able to test it.

[wolfv]

Did you use https://repo.prefix.dev for the host?

E.g. pixi auth login https://repo.prefix.dev --token $API_KEY

[ruben-arts]

The issue was that I was adding the https:// in front of the host parameter. Also found a confusing error when i specify a platform that is not in the channel i specify on prefix.dev:

ERROR rattler_repodata_gateway::fetch: error=HTTP status client error (404 Not Found) for url (https://e1a7cde76f1780ec06bac859036dbaf7.r2.cloudflarestorage.com/prefix-production-package-store/ruben-arts/osx-64/repodata.json?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=95b7c2b4d2b3edfd85ab35305a823505%2F20230621%2Fauto%2Fs3%2Faws4_request&X-Amz-Date=20230621T143505Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=54ab504f40068c8b2ab8aa4e3165326b36a8624f325dc09ec657319b52d9c051)
ERROR rattler_repodata_gateway::fetch: error=HTTP status client error (404 Not Found) for url (https://e1a7cde76f1780ec06bac859036dbaf7.r2.cloudflarestorage.com/prefix-production-package-store/ruben-arts/osx-arm64/repodata.json?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=95b7c2b4d2b3edfd85ab35305a823505%2F20230621%2Fauto%2Fs3%2Faws4_request&X-Amz-Date=20230621T143505Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=316ba6792da9aecdaf6e0630ed7b53e6791d919c5c7e8f465debc864a15cc888)
ERROR rattler_repodata_gateway::fetch: error=HTTP status client error (404 Not Found) for url (https://e1a7cde76f1780ec06bac859036dbaf7.r2.cloudflarestorage.com/prefix-production-package-store/ruben-arts/win-64/repodata.json?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=95b7c2b4d2b3edfd85ab35305a823505%2F20230621%2Fauto%2Fs3%2Faws4_request&X-Amz-Date=20230621T143505Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=0496735526a3356155fd22d5c46147822314f7d2d76fa60c61115f3ea6eff46d)
error: failed to fetch repodata from channels

Caused by:
    HTTP status client error (404 Not Found) for url (https://e1a7cde76f1780ec06bac859036dbaf7.r2.cloudflarestorage.com/prefix-production-package-store/ruben-arts/osx-64/repodata.json?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=95b7c2b4d2b3edfd85ab35305a823505%2F20230621%2Fauto%2Fs3%2Faws4_request&X-Amz-Date=20230621T143505Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=54ab504f40068c8b2ab8aa4e3165326b36a8624f325dc09ec657319b52d9c051)

[ruben-arts]

I'm okay with merging this but I see some low-hanging fruit to improve the UX some more:

• pixi auth login should check if the login actually works by pinging the host or something.
• pixi auth login x2 should tell its overwriting existing credentials
• pixi auth logout bla should tell me if it doesn't do anything as I might have a typo in which case it didn't do anything.
• pixi auth check would be very nice to have to check if you can still access all your hosts.

[wolfv]

Maybe let's merge and iterate? I think we should also fix what we store (eg. host or host + subdomain) but that might be better to fix in rattler vs. here).