Authenticating via Discord

[robdy]

Todo list:

• [x] Authenticating to Discord
• [x] Obtaining user consent and data
• [x] Adding user to the server
• [x] Changing nickname
• [x] Adding appropriate role
• [x] Logging info FHQ log

Must have:

• [x] Proper error catching (I sometimes receive unhandledException error) - done thx to @pkmnbumba
• [x] Add rate limit support

Good to have:

• [ ] (?) Removing the association by moderator
• [ ] (?) Disassociating the account/changing the associated account
• [ ] Add state checking during the auth (we don't have it on Reddit.js so is it really needed?)
• [ ] Add some nice frontend
• [ ] Finish this todo list with other stuff
• [ ] Saving account info into user profile and displaying it (not really must if we have logging)

To test: add the Discord bot data and go to http://localhost:1337/discord. It'll return your account info to your browser.

[robdy]

Added the most important file which I forgot yesterday. Also, I added joining to the server but it's not working for some reasons :thinking:

[robdy]

I think it's ready for testing :eyes:

[pkmnbumba]

Commenting to note that we discussed having an additional check to see if users have flair set before allowing them to join. Will try to work on it this weekend.

[robdy]

Tests I did:

• [x] from non-admin user (with flair set) joined successfully. Redirected to server. Log entry created
• [x] same user, tried to join again - redirected to server
• [x] cleared flair and record from tables user - didn't see the button + when I tried go to /discord I got 403
• [x] set flair again and then joined successfully