Docs: Add docs for Passwordless Authentication Using Magic Links (#96877)

* Docs: Add docs for Passwordless Authentication Using Magic Links

* Update docs/sources/setup-grafana/configure-security/configure-authentication/passwordless/index.md

Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>

* Update docs/sources/setup-grafana/configure-security/configure-authentication/passwordless/index.md

Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>

* Update docs/sources/setup-grafana/configure-security/configure-authentication/passwordless/index.md

Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>

* match Writer's Toolkit style

* Update docs/sources/setup-grafana/configure-security/configure-authentication/passwordless/index.md

Co-authored-by: Jack Baldry <jack.baldry@grafana.com>

---------

Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>
Co-authored-by: Jack Baldry <jack.baldry@grafana.com>

docs/sources/setup-grafana/configure-security/configure-authentication/_index.md

@@ -25,6 +25,7 @@ The following table shows all supported authentication methods and the features
 | [Auth Proxy]({{< relref "./auth-proxy" >}})           | no                | yes          | yes          | no                    | yes       | no             | N/A         | no                   | N/A        | N/A           |
 | [Azure AD OAuth]({{< relref "./azuread" >}})          | yes               | yes          | yes          | yes                   | yes       | yes            | N/A         | yes                  | yes        | yes           |
 | [Basic auth]({{< relref "./grafana" >}})              | yes               | N/A          | yes          | yes                   | N/A       | N/A            | N/A         | N/A                  | N/A        | N/A           |
+| [Passwordless auth]({{< relref "./passwordless" >}})  | yes               | N/A          | yes          | yes                   | N/A       | N/A            | N/A         | N/A                  | N/A        | N/A           |
 | [Generic OAuth]({{< relref "./generic-oauth" >}})     | yes               | yes          | yes          | yes                   | yes       | no             | N/A         | yes                  | yes        | yes           |
 | [GitHub OAuth]({{< relref "./github" >}})             | yes               | yes          | yes          | yes                   | yes       | yes            | N/A         | yes                  | yes        | yes           |
 | [GitLab OAuth]({{< relref "./gitlab" >}})             | yes               | yes          | yes          | yes                   | yes       | yes            | N/A         | yes                  | yes        | yes           |

docs/sources/setup-grafana/configure-security/configure-authentication/passwordless/index.md

@@ -0,0 +1,46 @@
+---
+description: Learn how to configure passwordless authentication with magic links in Grafana
+labels:
+  products:
+    - enterprise
+    - oss
+menuTitle: Passwordless
+title: Configure passwordless authentication with magic links
+weight: 200
+---
+
+# Configure passwordless authentication with magic links
+
+Passwordless authentication lets Grafana users authenticate with a magic link or one-time password (OTP) sent via email.
+
+## Enable passwordless authentication
+
+{{< docs/experimental product="passwordless authentication" featureFlag="passwordlessMagicLinkAuthentication" >}}
+
+To enable passwordless authentication, use the following configuration:
+
+```bash
+[auth.passwordless]
+enabled = true
+```
+
+## Code expiration
+
+By default, the one-time password (OTP) sent to a user's email is valid for 20 minutes. Use the `code_expiration` option to change the duration that the OTP is valid.
+
+```bash
+[auth.passwordless]
+enabled = true
+code_expiration = 20m
+```
+
+## Enable SMTP server
+
+The SMTP server must be enabled so that Grafana can send emails.
+The following configuration enables the SMTP server.
+For more information on configuring the SMTP server, refer to [SMTP](https://grafana.com/docs/grafana/latest/setup-grafana/configure-grafana/#smtp).
+
+```bash
+[smtp]
+enabled = true
+```