enable rbac on cluster

terraform/azure/aks/main.tf

@@ -5,7 +5,8 @@ resource "azurerm_kubernetes_cluster" "current" {
   location            = var.resource_group_location
   dns_prefix          = var.dns_prefix
 
-  oidc_issuer_enabled = var.oidc_issuer_enabled
+  oidc_issuer_enabled               = var.oidc_issuer_enabled
+  role_based_access_control_enabled = true
 
   default_node_pool {
     name       = var.default_node_pool_name