How to i recover or reset ssh key ubuntu

Hello, I lost my laptop on which i have set up ssh connection to my droplets. Now, I got a new machine with ubuntu 15.04 but i dont know how i can reset so as i can ssh my remote server via this new machine. Suprisingly, I had not backed up my ssh key

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First you will have to login to the server via SSH using your user password or using the console on the control panel. SSH keys are stored in ~/.ssh/authorized_keys file. Now you can remove your SSH or replace it with a new SSH key. Once you have done that, you will be able to join using the new SSH key.