docs: add password protection authentication documentation

fern/products/docs/docs.yml

@@ -299,6 +299,8 @@ navigation:
         path: ./pages/api-references/autopopulate-api-key.mdx
       - page: SSO
         path: ./pages/authentication/sso.mdx
+      - page: Password protection
+        path: ./pages/authentication/password.mdx
   - section: Security
     collapsed: true
     contents:

fern/products/docs/pages/authentication/overview.mdx

@@ -17,14 +17,17 @@ Learn how Fern handles user credentials and authentication in the [Security over
 
 Learn more about Fern's authentication options:
 
-<CardGroup cols={3}>
-  <Card title="Role-based access control" icon="fa-duotone fa-people-group" href="/docs/authentication/rbac">
+<CardGroup cols={2}>
+  <Card title="Role-based access control" icon="fa-duotone fa-people-group" href="/learn/docs/authentication/rbac">
     Granular access for different audiences
   </Card>
-  <Card title="API Key Injection" icon="fa-duotone fa-key" href="/docs/authentication/api-key-injection">
+  <Card title="API key injection" icon="fa-duotone fa-key" href="/learn/docs/authentication/api-key-injection">
     JWT or OAuth flows available
   </Card>
-  <Card title="SSO" icon="fa-duotone fa-user-check" href="/docs/authentication/sso">
+  <Card title="SSO" icon="fa-duotone fa-user-check" href="/learn/docs/authentication/sso">
     Basic functionality and simple setup
   </Card>
-</CardGroup>
+  <Card title="Password protection" icon="fa-duotone fa-lock" href="/learn/docs/authentication/password">
+    Shared password for simple access control
+  </Card>
+</CardGroup>

fern/products/docs/pages/authentication/password.mdx

@@ -0,0 +1,16 @@
+---
+title: Password protection
+subtitle: Protect your documentation site with a shared password for simple access control.
+---
+
+<Markdown src="/snippets/enterprise-plan.mdx"/>
+
+Password protection allows you to restrict access to your documentation site using a shared password. This is useful for pre-release documentation, internal resources, or any content you want to keep private without requiring individual user accounts.
+
+## How it works
+
+When password protection is enabled, visitors to your documentation site are prompted to enter a password before they can view any content. Once authenticated, users can browse the site freely until their session expires.
+
+## Setting up password protection
+
+To enable password protection for your documentation site, [contact our team](https://buildwithfern.com/contact) or reach out via Slack. Fern will configure the password for your site.