How to add container apps using User assigned identity

[sandeepc24]

I am trying to add azure container app.

I am creating the user assigned identity as

let sharedIdentit = userAssignedIdentity {
    name "user"
}

then using following to create ACA

let managedIdentity =
    { ManagedIdentity.Empty with
        UserAssigned = [ sharedIdentity.UserAssignedIdentity ]
    }

containerEnvironment {
    name "my-app"
    add_containers [
        containerApp {
            name "server"
            active_revision_mode ContainerApp.ActiveRevisionsMode.Single
            add_identity sharedIdentity
            add_managed_identity_registry_credentials [
                registry "myreg.azurecr.io" "user" managedIdentity
            ]

This causes error when deploying [{"code":"InvalidParameterValueInContainerTemplate","message":"The following field(s) are either invalid or missing. Field 'configuration.secrets' is invalid with details:

If using managed identity I don't expect to see any errors around secrets. I am not sure what I am dong wrong here.

[sandeepc24]

If someone else runs into this issue, all that is required is to use reference_registry_credentials in containerApp.