Move authentication to arbimon.org

[antonyharfield]

Context: We would like to (and need to for browser security reasons) have users login to Arbimon through an arbimon.org domain (not rfcx.org as it currently is). To achieve this, we will need separate logins for Arbimon and Guardian platforms.

This will solve the browser security issues affecting Safari (and soon to be Chrome) as identified in #1676.

Scope:

• Create a new Auth0 account for Guardian
• Move Guardian users to the new Auth0 account
• Switch current Auth0 account to use arbimon.org as its custom domain
• Ensure all web, mobile and desktop users are not impacted by this change (i.e. we want to avoid users having to download a new app)

[antonyharfield]

Molly raised a related point in an eng-support discussion that fully Arbimon branded signing experience would aid the conversion of new users from marketing emails.

Please remove the RFCx logo from the Arbimon login page and the Arbimon Sign Up page.

It isn't necessary to include and just confuses that sign in/log in user experience.

[koonchaya]

Should we remove the RFCx logo now?

[naluinui]

@koonchaya I think so according to Ant's comment above #1970 (comment)