Alloy prometheus.exporter.azure finds nothing

Question

hello… I’m trying to setup prometheus.exporter.azure and whilst it all looks happy and healthy I’m not getting anything coming through to my mimir instance.

I’ve added a relabel to be able to debug what is coming out of the block and all I see is this:

{__name__="up", instance="xxx", job="integrations/azure"} => {__name__="up", instance="xxx", job="integrations/azure"}
{__name__="scrape_duration_seconds", instance="xxx", job="integrations/azure"} => {}
{__name__="scrape_samples_scraped", instance="xxx", job="integrations/azure"} => {}
{__name__="scrape_samples_post_metric_relabeling", instance="xxx", job="integrations/azure"} => {}
{__name__="scrape_series_added", instance="xxx", job="integrations/azure"} => {}

This is my config:

    prometheus.exporter.azure "saas" {

      subscriptions    = [
        "xxx",
      ]
      resource_type    = "Microsoft.Storage/storageAccounts"
      regions          = [
        "northeurope",
        "westeurope",
        "eastus2",
        "centralus",
      ]
      metrics          = [
        "Transactions",
      ]
      timespan         = "PT1M"
    }

    prometheus.relabel "saas" {
      forward_to = [prometheus.remote_write.mimir.receiver]
    }

    prometheus.scrape "saas" {
      targets    = prometheus.exporter.azure.saas.targets
      forward_to = [prometheus.relabel.saas.receiver]
    }

I’m wondering if its an authentication problem, all the docs have is here: https://grafana.com/docs/alloy/latest/reference/components/prometheus/prometheus.exporter.azure/#authentication and just says its needed, but there aren’t any examples on how to provide the details - what am I missing? Is there an example anywhere?

The only way I can provoke any sort of output is if I ask for a metric doesn’t exist, I don’t know if that happens if authenticated or not.