Can't push with SSH key

I am trying to bring an existing project into bitbucket but am stuck with this error. Can you please help me resolve it. Thank you.

The authenticity of host 'bitbucket.org (131.103.20.167)' can't be establi shed.
RSA key fingerprint is 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'bitbucket.org,131.103.20.167' (RSA) to the lis t of known hosts.
Permission denied (publickey).
fatal: The remote end hung up unexpectedly
sdccdol@sdccdolvid.org /public_html/getreal# git push -u origin --all
Permission denied (publickey).
fatal: The remote end hung up unexpectedly
sdccdol@sdccdolvid.org /public_html/getreal# ssh-add -l
Could not open a connection to your authentication agent.
sdccdol@sdccdolvid.org /public_html/getreal# git push -u origin --all
Permission denied (publickey).
fatal: The remote end hung up unexpectedly