feat: add example provider config

* reformat code

Signed-off-by: patst <[email protected]>

examples/provider/provider-config-with-secret-azure-workload-identity.yaml

@@ -0,0 +1,34 @@
+apiVersion: kubernetes.crossplane.io/v1alpha1
+kind: ProviderConfig
+metadata:
+  name: kubernetes-provider
+spec:
+  credentials:
+    source: Secret
+    secretRef:
+      namespace: crossplane-system
+      name: cluster-config
+      key: kubeconfig
+  identity:
+    type: AzureWorkloadIdentityCredentials
+    source: Secret
+    secretRef:
+      name: azure-credentials
+      namespace: crossplane-system
+      key: credentials.json
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: azure-credentials
+  namespace: crossplane-system
+stringData:
+  # serverId hardcoded to AKS ID, see https://azure.github.io/kubelogin/concepts/aks.html#azure-kubernetes-service-aad-server
+  credentials.json: |
+    {
+      "tenantId": "<aad-tenant-id>",
+      "serverId": "6dae42f8-4368-4678-94ff-3960e28e3630",
+      "clientId": "<client-id>",
+      "federatedTokenFile": "/var/run/secrets/azure/tokens/azure-identity-token",
+      "authorityHost": "https://login.microsoftonline.com/"
+     }

internal/clients/azure/azure.go

@@ -3,13 +3,14 @@ package azure
 import (
 	"context"
 	"encoding/json"
-	apisv1alpha1 "github.com/crossplane-contrib/provider-kubernetes/apis/v1alpha1"
 	"net/http"
 
 	"github.com/Azure/kubelogin/pkg/token"
 	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 	"k8s.io/client-go/rest"
+
+	apisv1alpha1 "github.com/crossplane-contrib/provider-kubernetes/apis/v1alpha1"
 )
 
 // Credentials Secret content is a json whose keys are below.