diff --git a/src/index.ts b/src/index.ts
index 2451ee0..987e80d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,14 +1,19 @@
 import * as express from "express";
+import { users } from "./data";
+import { groups } from "./data";
 
 const app = express();
 
-
 app.get("/user", (req, res) => {
 	
 });
 
-app.post('/user', (req, res) => {
-
+app.post('/user/:userID', (req, res) => {
+	if(!(req.params.userID in users)) {
+		res.send('user ID not found');
+		return;
+	}
+	res.json(users[req.params.userID]);
 });
 
 app.patch('/user', (req, res) => {
@@ -42,7 +47,10 @@ app.get("/group", (req, res) => {
 });
 
 app.post('/group', (req, res) => {
-
+	groups[req.body.title] = {
+		id: 'id 0',
+		member_ids: []
+	}
 });
 
 app.patch('/group', (req, res) => {