VPS passwords are specific to each VPS and are encrypted to each virtual machine during deployment. There is no way to recover a virtual machine's password, though you can reset your password using a private SSH Key.
RESET A VPS PASSWORD USING PRIVATE SSH:
1. Connect to VM using private key:
ssh -i /path/to/id_rsa email@example.com
2. Reset the root password (type the following command in the command prompt ending each line with pressing the Enter button on the keyboard):
passwd <user> Enter & Confirm New Password exit
<user> is typically 'root' unless you have specifically made and are trying to log in as a user other than root.