/metrics endpoint didn't get redirected to SSO login page

Currently,
One of our customer did the security audit and they flagged the point
/metrics endpoint of grafana url didn’t get redirected to SSO login page.
whereas, all other endpoint for the same grafana url get redirected to SSO login page.
for example https://grafana.vbox.org/dashboards redirected to SSO login page
https://grafana.vbox.org/metrics didn’t get redirected to SSO login page