add instant auth

Author: ranbel

src/content/partials/cloudflare-one/warp/device-enrollment.mdx

@@ -19,7 +19,12 @@ import { Tabs, TabItem } from '~/components';
 Device posture checks are not supported in device enrollment policies. WARP can only perform posture checks after the device is enrolled.
 :::
 
-4. In the **Login methods** tab, select the [identity providers](/cloudflare-one/identity/idp-integration/) users can authenticate with. If you have not integrated an identity provider, you can use the [one-time PIN](/cloudflare-one/identity/one-time-pin/).
+4. In the **Login methods** tab:
+
+	a. Select the [identity providers](/cloudflare-one/identity/idp-integration/) users can authenticate with. If you have not integrated an identity provider, you can use the [one-time PIN](/cloudflare-one/identity/one-time-pin/).
+
+	b. (Optional) If you plan to only allow access via a single IdP, turn on **Instant Auth**. End users will not be shown the Cloudflare Access login page. Instead, Cloudflare will redirect users directly to your SSO login event.
+
 5. Select **Save**.
 
 </TabItem> <TabItem label="Terraform (v5)">