Get the osu! oauth token from MongoDB

I will likely use MongoDB for other things with this website in the future

netlify/functions/shared/api.ts

@@ -1,5 +1,3 @@
-import fetch from "node-fetch";
-
 export async function api<T>(url: string, restful_token?: string): Promise<T> {
   // eslint-disable-next-line @typescript-eslint/naming-convention
   return (restful_token ? fetch(url, {headers: {"Authorization": `Bearer ${restful_token}`}}) : fetch(url))