chore(docs): add Express sign-in and sign-out route examples to sessi…

…on management (#12450)

docs: add Express sign-in and sign-out route examples to session management

docs/pages/getting-started/session-management/login.mdx

@@ -129,8 +129,47 @@ Just like in other frameworks, you can also pass a provider to the `signIn` func
   </Code.Svelte>
   <Code.Express>
 
+
 The Express package runs server-side and therefore it doesn't make sense to create a "SignIn button component". However, to signin or signout with Express, send a request to the appropriate [REST API Endpoints](/reference/core/types#authaction) from your client (i.e. `/auth/signin`, `/auth/signout`, etc.).
 
+To sign in users with Express, you can create a route that handles the sign-in logic. Here is an example:
+
+```js filename="src/routes/auth.js"
+const express = require("express")
+const router = express.Router()
+const { signIn } = require("../auth")
+
+router.post("/auth/signin", async (req, res) => {
+  try {
+    await signIn(req, res)
+    res.redirect("/dashboard")
+  } catch (error) {
+    res.status(500).send("Sign in failed")
+  }
+})
+
+module.exports = router
+```
+
+To sign out users with Express, you can create a route that handles the sign-out logic. Here is an example:
+
+```js filename="src/routes/auth.js"
+const express = require("express")
+const router = express.Router()
+const { signOut } = require("../auth")
+
+router.post("/auth/signout", async (req, res) => {
+  try {
+    await signOut(req, res)
+    res.redirect("/")
+  } catch (error) {
+    res.status(500).send("Sign out failed")
+  }
+})
+
+module.exports = router
+```
+
   </Code.Express>
 </Code>
 
@@ -352,6 +391,44 @@ Client-side is a bit simpler as we just need to import a button `on:click` handl
 
 The Express package runs server-side and therefore it doesn't make sense to create a "SignIn button component". However, to signin or signout with Express, send a request to the appropriate [REST API Endpoints](/reference/core/types#authaction) from your client (i.e. `/auth/signin`, `/auth/signout`, etc.).
 
+To sign in users with Express, you can create a route that handles the sign-in logic. Here is an example:
+
+```js filename="src/routes/auth.js"
+const express = require("express")
+const router = express.Router()
+const { signIn } = require("../auth")
+
+router.post("/auth/signin", async (req, res) => {
+  try {
+    await signIn(req, res)
+    res.redirect("/dashboard")
+  } catch (error) {
+    res.status(500).send("Sign in failed")
+  }
+})
+
+module.exports = router
+```
+
+To sign out users with Express, you can create a route that handles the sign-out logic. Here is an example:
+
+```js filename="src/routes/auth.js"
+const express = require("express")
+const router = express.Router()
+const { signOut } = require("../auth")
+
+router.post("/auth/signout", async (req, res) => {
+  try {
+    await signOut(req, res)
+    res.redirect("/")
+  } catch (error) {
+    res.status(500).send("Sign out failed")
+  }
+})
+
+module.exports = router
+```
+
 </Code.Express>
 </Code>