How to add the ssl certificates for grafana version 6.7

HI Team,
I have added the ssl certificates in the path /etc/ssl/httpscertificates/cert-file and /etc/ssl/httpscertificates/key-file and included this path in the grafana.ini file
also I have changed the protocol from http to https and done the required changes. after restarting the server it was not working as expected. After revert back the changes to the normal http it was working fine.