diff --git a/.eslintrc.js b/.eslintrc.js
index e36019a..ebfa30a 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -19,5 +19,6 @@ module.exports = {
     'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
     'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
     'import/extensions': 'off',
+    camelcase: ['error', { properties: 'never', ignoreDestructuring: true }],
   },
 }
diff --git a/README.md b/README.md
index 21d4c9e..2b70dd9 100644
--- a/README.md
+++ b/README.md
@@ -40,8 +40,22 @@ yarn app
 
 ## CLI terminal client
 
-Open server first, then
+Open server first, then create a session by `POST /api/v1/sessions`
+
+```bash
+curl -X 'POST' \
+  'http://localhost:3000/api/v1/sessions' \
+  -H 'accept: application/json' \
+  -H 'Content-Type: application/json' \
+  -d '{
+  "quest_id": "helloworld"
+}'
+```
+
+Then use the `_id` field in response
 
 ```
-yarn cli
+yarn cli [_id]
+# example
+yarn cli 64be226a39c0043cd1cdf7c2
 ```
diff --git a/server/src/api/controllers/sessionController.js b/server/src/api/controllers/sessionController.js
index 574e50d..19d431d 100644
--- a/server/src/api/controllers/sessionController.js
+++ b/server/src/api/controllers/sessionController.js
@@ -25,6 +25,7 @@ export async function createSession(req, res) {
   const newSession = new Session({
     user: req.user,
     quest,
+    containerId: `quest-${quest.id}-${req.user.username}-${Date.now()}`,
   })
 
   try {
diff --git a/server/src/api/socket.js b/server/src/api/socket.js
index d8c1379..5f08973 100644
--- a/server/src/api/socket.js
+++ b/server/src/api/socket.js
@@ -1,12 +1,38 @@
 import { Server } from 'socket.io'
 import { getOrCreateContainer, attachContainer } from '../utils/docker.js'
+import Session from '../models/session.js'
+import { defaultUser } from '../utils/auth.js'
 
 export default (server) => {
   const io = new Server(server)
 
+  io.use(async (socket, next) => {
+    console.log('Authenticating...')
+    try {
+      const user = await defaultUser()
+      // eslint-disable-next-line no-param-reassign
+      socket.user = user
+      next()
+    } catch (err) {
+      console.error(err)
+      next(err)
+    }
+  })
+
   io.on('connection', async (socket) => {
     console.log('Connected to the client.')
-    const container = await getOrCreateContainer('odyssey-test')
+    const session = await Session.findOne({
+      _id: socket.handshake.query.session_id,
+      user: socket.user,
+    })
+
+    if (!session) {
+      socket.send('Session not found.')
+      socket.disconnect()
+      return
+    }
+
+    const container = await getOrCreateContainer(session.containerId)
     const stream = await attachContainer(container)
 
     stream.on('data', (chunk) => {
@@ -22,6 +48,6 @@ export default (server) => {
       console.log('Disconnected from the client.')
     })
 
-    socket.send('Hello from server!')
+    socket.send(`${container.id}\n`)
   })
 }
diff --git a/server/src/client.js b/server/src/client.js
index cdbf7b8..40e16cd 100644
--- a/server/src/client.js
+++ b/server/src/client.js
@@ -5,7 +5,14 @@ stdin.setRawMode(true)
 stdin.resume()
 stdin.setEncoding('utf8')
 
-const socket = io('ws://localhost:3000')
+const sessionId = process.argv[2]
+console.log(`Session ID: ${sessionId}`)
+
+const socket = io('ws://localhost:3000', {
+  query: {
+    session_id: sessionId,
+  },
+})
 
 socket.on('open', function open() {
   console.log('Connected to the server.')
diff --git a/server/src/middleware/auth.js b/server/src/middleware/auth.js
index 43c8826..62bb190 100644
--- a/server/src/middleware/auth.js
+++ b/server/src/middleware/auth.js
@@ -1,17 +1,9 @@
 /* eslint-disable import/prefer-default-export */
-import User from '../models/user.js'
+import { defaultUser } from '../utils/auth.js'
 
 export async function authMiddleware(req, res, next) {
   try {
-    let user = await User.findOne({ username: 'defaultUser' })
-    if (!user) {
-      user = new User({
-        username: 'defaultUser',
-        email: 'john@example.com',
-      })
-      await user.save()
-    }
-    req.user = user
+    req.user = await defaultUser()
     next()
   } catch (err) {
     res.status(500).json({ message: err.message })
diff --git a/server/src/utils/auth.js b/server/src/utils/auth.js
new file mode 100644
index 0000000..e33cf5f
--- /dev/null
+++ b/server/src/utils/auth.js
@@ -0,0 +1,14 @@
+/* eslint-disable import/prefer-default-export */
+import User from '../models/user.js'
+
+export async function defaultUser() {
+  let user = await User.findOne({ username: 'defaultUser' })
+  if (!user) {
+    user = new User({
+      username: 'defaultUser',
+      email: 'jackson@example.com',
+    })
+    await user.save()
+  }
+  return user
+}
diff --git a/server/src/utils/docker.js b/server/src/utils/docker.js
index 1095d38..a78b738 100644
--- a/server/src/utils/docker.js
+++ b/server/src/utils/docker.js
@@ -13,9 +13,24 @@ const containerOptions = {
   StdinOnce: false,
 }
 
-export async function getOrCreateContainer(name) {
+export async function createContainer() {
+  const container = await engine.createContainer({
+    ...containerOptions,
+  })
+  await container.start()
+  return container
+}
+
+export async function getContainer(id) {
+  const container = await engine.getContainer(id)
+  await container.start()
+  return container
+}
+
+export async function getOrCreateContainer(id) {
+  console.log(`Getting container: ${id}`)
   try {
-    const container = engine.getContainer(name)
+    const container = engine.getContainer(id)
     if (!(await container.inspect()).State.Running) {
       await container.start()
     }
@@ -23,7 +38,7 @@ export async function getOrCreateContainer(name) {
   } catch (error) {
     const container = await engine.createContainer({
       ...containerOptions,
-      name,
+      name: id,
     })
     await container.start()
     console.log(container.id)
@@ -31,12 +46,20 @@ export async function getOrCreateContainer(name) {
   }
 }
 
-export function attachContainer(container) {
+export async function attachContainer(container) {
   // Create an exec instance with bash shell
-  return container.attach({
-    stream: true,
-    stdin: true,
-    stdout: true,
-    stderr: true,
+  const exec = await container.exec({
+    AttachStdin: true,
+    AttachStdout: true,
+    AttachStderr: true,
+    Cmd: ['/bin/bash'],
+    Tty: true,
   })
+
+  const execOutput = await exec.start({
+    Detach: false,
+    Tty: true,
+  })
+
+  return execOutput.socket
 }