So you still have access to the server which is good.

If you have not, you need to generate some ssh-keys. Once you have done that you need to find your public key.

Which should look something like this example key, If your on windows your key might look different but needs to have this format.

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC7kGBwVKF0E54AZl/kGHEn9PgnfbGAbvNMebdSl3YNswRvW0bGdrL8KpW/BQZ76eZV9H5mdMgH6GPxLWhjFTz1jVWtW03s3c2q83xqXsyoXCnHp3NAEggwTHzkzd+OyMSSO2+fSc9ACGfpTvxZGvU5cRAeXkjTg1PQppxBv7lkG8HINYyYiEt6ck70aSUo2Fzck2IQrdTgD62riiUNOGusRGWXPB5thAd/1lNiAxQFu0dssiuDS8BwoU3DaaM0Vm5HH0NUp8Zzxkb7bcbatqs8Yd0F9NEJLtUAyjTxKjbaTcHCQLshtDi+WLMS3kUrJkYPsk/vAyPcLYqiPrvldMjj example@snapshooter.io

You then need to copy this and use the Launch console to access your droplet.

Once in run the following command to edit the authorized_keys file

nano /root/.ssh/authorized_keys

Then append your public key to the authorized keys file. Once this is complete you should be able to log in. This will give you root access, if you need access to a different user account it would be

nano /home/example/.ssh/authorized_keys

Hope this helps

Simon
SnapShooter.io - Better DigitalOcean Backups