Homebrew officially supports Linux since 2.0.0 release.

Is there a way to sign up without Slack or G+?

Nope, fraid not. Is there another service your team uses for identity when signing up for tools?

The service itself? SAML (e.g. Active Directory)?

I don't have a team. I was just curious.

LDAP?

Hmm. I have MicroG since months and last i checked Netflix worked just fine.

That's good news! I assume you're using Magisk for root?

Actually no. I'm using Lineage su addon.