Plex

Support level: Community

Allows users to authenticate using their Plex credentials

Preparation

None

Add Plex as a source

Name: Choose a name
Slug: Set a slug
Client ID: Set a unique Client Id or leave the generated ID
Press Load Servers to login to plex and pick the authorized Plex Servers for "allowed users"
Decide if anyone with a plex account can authenticate or only friends you share with

Save, and you now have Plex as a source.

note

For more details on how-to have the new source display on the Login Page see here.