I've created a new Ubuntu/Ghost droplet using an SSH key & whenever I try to access the console I get the following message:

<droplet name> login:

Since I've used an SSH key to create this droplet I've not been sent a root password so have no idea what I'm supposed to be entering here. Any help would be much appreciated.

P.S. This is my first attempt at using SSH so forgive me if this is blindingly obvious