curl --request GET \
  --url https://api.pipedream.com/v1/connect/usage \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "credits_used": 123,
      "usage_start_ts": 123,
      "usage_end_ts": 123,
      "action_run_credits_used": 123,
      "proxy_credits_used": 123,
      "source_emit_credits_used": 123
    }
  ]
}