Add docs around importing auth plugins

staging/src/k8s.io/client-go/examples/README.md

@@ -3,6 +3,25 @@
 This directory contains examples that cover various use cases and functionality
 for client-go.
 
+### Auth plugins
+
+Client configuration is typically loaded from kubeconfig files containing server and credential configuration.
+Several plugins for obtaining credentials from external sources are available, but are not loaded by default.
+To enable these plugins in your program, import them in your main package.
+
+You can load all auth plugins:
+```go
+import _ "k8s.io/client-go/plugin/pkg/client/auth
+```
+
+Or you can load specific auth plugins:
+```go
+import _ "k8s.io/client-go/plugin/pkg/client/auth/azure"
+import _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
+import _ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
+import _ "k8s.io/client-go/plugin/pkg/client/auth/openstack"
+```
+
 ### Configuration
 
 - [**Authenticate in cluster**](./in-cluster-client-configuration): Configure a

staging/src/k8s.io/client-go/examples/create-update-delete-deployment/main.go

@@ -31,8 +31,15 @@ import (
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/client-go/util/homedir"
 	"k8s.io/client-go/util/retry"
-	// Uncomment the following line to load the gcp plugin (only required to authenticate against GKE clusters).
+	//
+	// Uncomment to load all auth plugins
+	// _ "k8s.io/client-go/plugin/pkg/client/auth
+	//
+	// Or uncomment to load specific auth plugins
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/azure"
 	// _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/openstack"
 )
 
 func main() {

staging/src/k8s.io/client-go/examples/in-cluster-client-configuration/main.go

@@ -25,6 +25,15 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
+	//
+	// Uncomment to load all auth plugins
+	// _ "k8s.io/client-go/plugin/pkg/client/auth
+	//
+	// Or uncomment to load specific auth plugins
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/azure"
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/openstack"
 )
 
 func main() {

staging/src/k8s.io/client-go/examples/out-of-cluster-client-configuration/main.go

@@ -28,8 +28,15 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/clientcmd"
-	// Uncomment the following line to load the gcp plugin (only required to authenticate against GKE clusters).
+	//
+	// Uncomment to load all auth plugins
+	// _ "k8s.io/client-go/plugin/pkg/client/auth
+	//
+	// Or uncomment to load specific auth plugins
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/azure"
 	// _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
+	// _ "k8s.io/client-go/plugin/pkg/client/auth/openstack"
 )
 
 func main() {