Fix definitions.json

specification/kubernetesconfiguration/resource-manager/Microsoft.KubernetesConfiguration/common/2021-05-01-preview/definitions.json

@@ -12,6 +12,17 @@
       ]
     }
   ],
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "flow": "implicit",
+      "description": "Azure Active Directory OAuth2 Flow",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  },
   "paths": {},
   "definitions": {},
   "parameters": {