SPIKE - Add Discord OAuth

[hsorathia]

Really a two part story.

First find out if this is going to be purely a client-side application or a full-stack application. Then do some research about the different types of authentication available by reading some docs here.

Come back with your findings and then make a new issue (or modify this one) with how you're going to accomplish it.

[khainl1110]

This feature is hard to implement right now as we don't know how to do it. First I implement Auth0 in order to add Discord authorization. But then I realized that Discord authentication this way only give access to username, email and avatar. On the other hand, one person in Discord Developer group told me server insights is not exposed to discord bots, therefore we don't know how to proceed with this features as of for now.