Adds docs for azd login mode.

docs/book/src/README.md

@@ -10,4 +10,5 @@
 - [non-interactive user principal login](./concepts/login-modes/ropc.md) using [Resource owner login flow](https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth-ropc)
 - [non-interactive managed service identity login](./concepts/login-modes/msi.md)
 - [non-interactive Azure CLI token login (AKS only)](./concepts/login-modes/azurecli.md)
+- [non-interactive Azure Developer CLI token login (AKS only)](./concepts/login-modes/azd.md)
 - [non-interactive workload identity login](./concepts/login-modes/workloadidentity.md)

docs/book/src/SUMMARY.md

@@ -8,6 +8,7 @@
   - [Login Modes](./concepts/login-modes.md)
     - [Device Code](./concepts/login-modes/devicecode.md)
     - [Azure CLI](./concepts/login-modes/azurecli.md)
+    - [Azure Developer CLI](./concepts/login-modes/azd.md)
     - [Web Browser Interactive](./concepts/login-modes/interactive.md)
     - [Service Principal](./concepts/login-modes/sp.md)
     - [Managed Service Identity](./concepts/login-modes/msi.md)

docs/book/src/concepts/login-modes/azd.md

@@ -0,0 +1,27 @@
+# Azure Developer CLI (azd)
+
+This login mode uses the already logged-in context performed by Azure Developer CLI to get the access token.
+The token will be issued in the same Azure AD tenant as in `azd auth login`.
+
+`kubelogin` will not cache any token since it's already managed by Azure Developer CLI.
+
+> ### NOTE
+>
+> This login mode only works with managed AAD in AKS.
+
+## Usage Examples
+
+```sh
+azd auth login
+
+export KUBECONFIG=/path/to/kubeconfig
+
+kubelogin convert-kubeconfig -l azd
+
+kubectl get nodes
+```
+
+## References
+
+- https://learn.microsoft.com/azure/developer/azure-developer-cli/overview
+- https://github.com/azure/azure-dev