diff --git a/src/api.ts b/src/api.ts
index df07f44..54e5169 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -1,117 +1,163 @@
-import { Router } from 'express';
-import {
-	getGroupByID,
-	getPoolByID,
-	getPoolsWithUser,
-	getUserByID,
-	groups,
-	users,
-} from './data';
-
-export const router = Router();
-
-router.get('/user/:userID', (req, res) => {
-	if (typeof req.query.userID != 'string') {
-		return;
-	}
-
-	let userID = req.query.userID;
-	let user = getUserByID(userID);
-
-	if (user) {
-		res.json({ status: 'success', data: user });
-	} else {
-		res.json({ status: 'error', error: 'not_found' });
-	}
-});
-
-router.post('/user', (req, res) => {
-	if (typeof req.query.userID != 'string') {
-		return;
-	}
-
-	let userID = req.query.userID;
-	let user = getUserByID(userID);
-
-	if (user) {
-		res.json({ status: 'success', data: user });
-	} else {
-		res.json({ status: 'error', error: 'not_found' });
-	}
-});
-
-router.post('/user', (req, res) => {
-	if (req.body.userID in users) {
-		res.json({ status: 'error', error: 'already_exists' });
-	} else {
-		users[req.body.userID] = {
-			id: req.body.userID,
-			username: req.body.username,
-			first_name: req.body.first_name,
-			last_name: req.body.last_name,
-		};
-		res.json({ status: 'success' });
-	}
-});
-
-router.delete('/user', (req, res) => {
-	delete users[req.body.userID];
-	res.json({ status: 'success' });
-});
-
-router.get('/pool', (req, res) => {
-	if (typeof req.query.poolID != 'string') {
-		return;
-	}
-
-	let poolID = req.query.poolID;
-	let pool = getPoolByID(poolID);
-
-	if (pool) {
-		res.json({ status: 'success', data: pool });
-	} else {
-		res.json({ status: 'error', error: 'not_found' });
-	}
-});
-
-router.get('/group/:groupID', (req, res) => {
-	if (!(req.params.groupID in groups)) {
-		res.send('invalid group id');
-		return;
-	}
-	res.json(groups[req.params.groupID]);
-});
-
-router.post('/group', (req, res) => {
-	groups[req.body.title] = {
-		id: 'temp id 0',
-		member_ids: [],
-	};
-});
-
-router.patch('/group', (req, res) => {});
-
-router.delete('/group', (req, res) => {
-	delete groups[req.body.groupID];
-});
-
-router.get('/my_pools', (req, res) => {
-	let userID = 'myfatemi04';
-	let poolIDs = getPoolsWithUser(userID);
-	res.json({ status: 'success', data: poolIDs.map((id) => getPoolByID(id)) });
-});
-
-router.get('/group', (req, res) => {
-	if (typeof req.query.groupID != 'string') {
-		return;
-	}
-
-	let groupID = req.query.groupID;
-	let group = getGroupByID(groupID);
-
-	if (group) {
-		res.json({ status: 'success', data: group });
-	} else {
-		res.json({ status: 'error', error: 'not_found' });
-	}
-});
+import { Router } from 'express';
+import {
+	getGroupByID,
+	getPoolByID,
+	getPoolsWithUser,
+	getUserByID,
+	groups,
+	users,
+    pools
+} from './data';
+
+export const router = Router();
+
+router.get('/user', (req, res) => {
+	if (typeof req.query.userID != 'string') {
+		return;
+	}
+
+	let userID = req.query.userID;
+	let user = getUserByID(userID);
+
+	if (user) {
+		res.json({ status: 'success', data: user });
+	} else {
+		res.json({ status: 'error', error: 'not_found' });
+	}
+});
+
+router.post('/user', (req, res) => {
+	if (req.body.userID in users) {
+		res.json({ status: 'error', error: 'already_exists' });
+	} else {
+		users[req.body.userID] = {
+			id: req.body.userID,
+			username: req.body.username,
+			first_name: req.body.first_name,
+			last_name: req.body.last_name,
+		};
+		res.json({ status: 'success' });
+	}
+});
+
+router.delete('/user', (req, res) => {
+	delete users[req.body.userID];
+	res.json({ status: 'success' });
+});
+
+router.get('/pool', (req, res) => {
+	if (typeof req.query.poolID != 'string') {
+		return;
+	}
+
+	let poolID = req.query.poolID;
+	let pool = getPoolByID(poolID);
+
+	if (pool) {
+		res.json({ status: 'success', data: pool });
+	} else {
+		res.json({ status: 'error', error: 'not_found' });
+	}
+});
+
+router.post('/pool', (req, res) => {
+    if(req.body.poolID in pools) {
+        res.json({status: 'error', error: 'already_exists'});
+    }
+    else {
+        pools[req.body.poolID] = {
+            id: req.body.poolID,
+            title: req.body.title,
+            description: req.body.description,
+            participant_ids: [],
+            driver_id: 'no driver',
+            create_time: 'create time',
+            update_time: 'update time',
+            comments: [],
+            group_id: 'no group',
+            status: 'pending',
+            capacity: 0,
+            direction: 'pickup',
+            author_id: 'no author',
+            type: 'request'
+        }
+        res.json({status: 'success'});
+    }
+});
+
+router.delete('/pool', (req, res) => {
+    delete pools[req.body.poolID];
+    res.json({status: 'success'});
+});
+
+router.get('/group', (req, res) => {
+	if (typeof req.query.groupID != 'string') {
+		return;
+	}
+
+	let groupID = req.query.groupID;
+	let group = getGroupByID(groupID);
+
+	if (group) {
+		res.json({ status: 'success', data: group });
+	} else {
+		res.json({ status: 'error', error: 'not_found' });
+	}
+});
+
+router.post('/group', (req, res) => {
+    if(req.body.groupID in groups) {
+        res.json({status: 'error', error: 'already_exists'});
+    }
+    else {
+        groups[req.body.groupID] = {
+            id: req.body.groupID,
+            member_ids: []
+        }
+        res.json({status: 'success'});
+    }
+});
+
+router.delete('/group', (req, res) => {
+    delete groups[req.body.groupID];
+    res.json({status: 'success'});
+});
+
+router.get('/my_pools', (req, res) => {
+	if (typeof req.query.userID != 'string') {
+		return;
+	}
+
+	let userID = req.query.userID;
+	let groupsWithUser = getPoolsWithUser(userID);
+
+	if (groupsWithUser) {
+		res.json({ status: 'success', data: groupsWithUser });
+	} else {
+		res.json({ status: 'error', error: 'not_found' });
+	}
+});
+
+
+
+
+
+
+
+
+
+
+
+
+router.post('/my_pools', (req, res) => {
+    if(req.body.groupID in groups) {
+        res.json({status: 'error', error: 'already_exists'});
+    }
+    else {
+        groups[req.body.groupID] = {
+            id: req.body.groupID,
+            member_ids: []
+        }
+        res.json({status: 'success'});
+    }
+});
\ No newline at end of file