Integrate with Auth0 (OAUTH2 meta-authentication provider)

[garthk]

Further to @dweldon's comment on #176:

Integrating with a meta-authentication provider like auth0 could be really useful.

Auth0's back end identity providers include:

• Most of the OAUTH2 social providers you'd expect
• ADFS, Active Directory, LDAP, and SAML-P for enterprise SSO
• Password-less authentication via email, SMS, and the iOS touch sensor
• Auth0's own cloud identity service
• The database of your choice

That, plus a free tier for 7K users across Auth0's database plus 1-2 social providers, could reduce the urgency to hook up all of the above. It'd certainly make life easier for me. ツ

[deontologician]

This sounds reasonable. I think we should probably work on getting something like #428 first so that it's easier to build 3rd party modules to different auth types

[deontologician]

This was done in #601 and #733