Added steps to Add a permission to User-assigned identity

Author: Satyanarayanatalluri

articles/operator-nexus/how-to-credential-manager-key-vault.md

@@ -134,6 +134,18 @@ az networkcloud cluster update --ids /subscriptions/<subscription ID>/resourceGr
 az networkcloud cluster show --ids /subscriptions/<subscription ID>/resourceGroups/<Resource Group Name>/providers/Microsoft.NetworkCloud/clusters/<Nexus Cluster Name> --query secretArchive
 ```
 
+## Add a permission to User-assigned identity
+
+When using a User-assigned identity, add the following role assignment to the UAI resource:
+
+1. Open the Azure Portal and locate the User-assigned identity in question.
+2. Under **Access control (IAM)**, click **Add role assignment**.
+3. Select **Role**: Managed Identity Operator. (See the permissions that the role provides [here](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles/identity#managed-identity-operator)).
+4. Assign access to: **User, group, or service principal**.
+5. Select **Member**: AFOI-NC-MGMT-PME-PROD application.
+6. Review and assign.
+
+
 For more help:
 
 ```console