Force dynamic on OAuth routes

See https://github.com/vercel/next.js/discussions/48989.

src/app/oauth/discord/login/route.ts

@@ -1,6 +1,8 @@
 import { DiscordAuthProvider } from "@/auth/discord";
 import { v4 } from "uuid";
 
+export const dynamic = "force-dynamic";
+
 export async function GET(request: Request) {
   let url = `https://discord.com/oauth2/authorize`;
   let state = v4();

src/app/oauth/github/login/route.ts

@@ -1,6 +1,8 @@
 import { GitHubAuthProvider } from "@/auth/github";
 import { v4 } from "uuid";
 
+export const dynamic = "force-dynamic";
+
 export async function GET(request: Request) {
   let url = `https://github.com/login/oauth/authorize`;
   let state = v4();