mhanberg
Implementing API Authentication with Guardian in Phoenix
Hi! I recently finished adding authentication to my Phoenix API, so I wanted to share what I learned.
I haven’t created authentication for an API only application before, so not using sessions/cookies was a little confusing at first. I hope this post can help others who haven’t writter an API before!
Thanks!
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mhanberg
The documentation for the configuration you’re looking for is here GitHub - ueberauth/guardian: Elixir Authentication · GitHub. These options go in the configuration in config.ex
The default TTL (time to live) for the JWT is 4 weeks and I believe you need to manually refresh the token. My post doesn’t detail that aspect 
soundstruck
Also have a look at GitHub - ueberauth/guardian_db: Guardian DB integration for tracking tokens and ensuring logout cannot be replayed. · GitHub for a way to revoke tokens issued.
mhanberg
I’m on a business trip right now, I’ll reply to this when I get some free
time. But in the meantime, look into the Phoenix Fallback Controller
functionality.
Relevant blog →
https://swanros.com/2017/03/04/action-fallback-contexts-phoenix1-3-tiny-controllers/amp/
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