feat: adds me endpoint that returns session info

pages/api/me.ts

@@ -0,0 +1,21 @@
+import type { NextApiRequest, NextApiResponse } from "next";
+
+import { ensureSession } from "@calcom/lib/auth";
+import { defaultHandler, defaultResponder } from "@calcom/lib/server";
+
+import { User } from ".prisma/client";
+
+async function handler(
+  req: NextApiRequest,
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  _res: NextApiResponse<Response>
+): Promise<{ error?: string; user?: Partial<User> }> {
+  const session = await ensureSession({ req });
+  /* Only admins can opt-in to V2 for now */
+  if (!session) return { error: "You need to be logged in" };
+  return { user: { ...session.user, email: session.user.email || "" } };
+}
+
+export default defaultHandler({
+  GET: Promise.resolve({ default: defaultResponder(handler) }),
+});