adding route for sign up and such

packages/api/services/user.service.ts

@@ -0,0 +1,23 @@
+import { ObjectId } from "mongodb";
+import { User } from "@nirvana/core/models";
+import { collections } from "./database.service";
+
+export class UserService {
+  static async getUserById(userId: string) {
+    const query = { _id: new ObjectId(userId) };
+
+    return (await collections.users?.findOne(query)) as unknown as User;
+  }
+
+  static async createUserIfNotExists(newUser: User) {
+    return await collections.users?.insertOne(newUser);
+  }
+
+  static async getGoogleUserInfoWithAccessToken(accessToken: string) {
+    return await (
+      await fetch(
+        `https://www.googleapis.com/oauth2/v1/userinfo?access_token=${accessToken}`
+      )
+    ).json();
+  }
+}