Feature: Support Discord Authorization

[foestauf]

Feature Description

Add support to allow login via Discord OAuth2 flow. https://discord.com/developers/docs/topics/oauth2

Describe the solution you'd like

Utilize Discord as an identify provider.

Describe alternatives you've considered

None.

Additional context

None.

[lakhansamani]

Thank you @foestauf for adding, soon will be adding support for this 👍