[plugins/prometheus] impossible to disable the metrics endpoint

[synectric]

Describe the bug

It's currently impossible to disable the /metrics endpoint exposed by the @graphql-yoga/plugin-prometheus plugin, passing endpoint: false to the plugin's options doesn't do what one would expect it to.

I believe the issue is on this line:

const endpoint = options.endpoint || '/metrics';

Passing false causes the "or" clause to move to the second option, i.e. the default /metrics endpoint. I would expect this line to either use the nullish coalesce operator (??) or some other solution which enables disabling the endpoint.

Temporary workaround

I'm currently disabling the endpoint using a simple plugin that overrides the default behavior by returning a 403 response on the path:

{
  onRequest: ({ url, endResponse }) => {
    if (url.pathname === '/metrics') {
      return endResponse(new Response('Forbidden', { status: 403 }));
    }
  },
}

Your Example Website or App

N/A

Steps to Reproduce the Bug or Issue

1. Use the @graphql-yoga/plugin-prometheus Yoga plugin
2. Pass the options { endpoint: false } to it
3. Go to the /metrics URL in browser
4. The metrics data is still available

Expected behavior

1. Use the @graphql-yoga/plugin-prometheus Yoga plugin
2. Pass the options { endpoint: false } to it
3. Go to the /metrics URL in browser
4. The server shows the default Yoga landing page (or equivalent)

Screenshots or Videos

No response

Platform

N/A

Additional context

No response