Integrate Redbrick API to blockbot to handle discord authentication/registering

[aydenjahola]

[wizzdom]

Cool!
So the plan is to add a discordID field in ldap allowing discord users to be associated with redbrick accounts. This will mean that all the sensitive processing and logic is done by the API and all blockbot has to do is forward the data onto the API

• a /register command would take in a member's details and post this to the API. The API server will additionally check the CnS API to make sure the user has paid.
• a /verify command would query the API with the user's discordID and if it exists, check that yearsPaid is greater than 0.

Additionally, we might look into adding these in the future:

• a /shell command would take in a shell: zsh, bash, sh etc., query the api using the user's discordID and update the loginShell
• admins might like some subcommands under a /admin command to perform checks, update accounts etc. This will have to be restricted to a private admin channel ID

I'm not sure about the last few as there may be some security concerns, but the first two are the main ones we will want to implement.