Prometheus_ecto not working

Hi Team,

Can someone let me know, how to use prometheus_ecto .

I did followed the sets provided in the documentation.
In Application startup

RepoInstrumenter.setup()
:ok =
:telemetry.attach(
“prometheus-ecto”,
[:my_app, :repo, :query],
&MyApp.RepoInstrumenter.handle_event/4,
%{})

Plug Module
defmodule MyApp.RepoInstrumenter do
@moduledoc “”"
Pipeline Instrumenter for Plugs
“”"
use Prometheus.EctoInstrumenter
end

After firing query, But still, i don’t see any event generating.