OAuth info stuff (#849)

* OAuth info stuff

* fix docs

* oops

src/util/Constants.js

@@ -128,6 +128,10 @@ const Endpoints = exports.Endpoints = {
 
   // webhooks
   webhook: (webhookID, token) => `${API}/webhooks/${webhookID}${token ? `/${token}` : ''}`,
+
+  // oauth
+  myApp: `${API}/oauth2/applications/@me`,
+  getApp: (id) => `${API}/oauth2/authorize?client_id=${id}`,
 };
 
 exports.Status = {