As you can see from the link I shared, it starts from step 2. I used lego client, not bncert tool. I don't want to use bncert tool for now.
Please tell me this if it's not clear.
I used lego to install ssl certificate. As per your instructions, I used path=/opt/bitnami/letsencrypt. Because of this "lego list" command not giving any output as it is looking for certificates in /opt/bitnami/letsencrypt/.lego, not in /opt/bitnami/letsencrypt. Please tell me how to make lego list command work, now that I already installed my cert