Standard usage for existing account:

$ oplop
Enter account nickname: ******
Enter master password: ******
Your account password has been copied to the clipboard.

Usage for a new account:

$ oplop new
Enter account nickname: ******
Enter master password: ******
Confirm account nickname: ******
Confirm master password: ******
Your new account password has been copied to the clipboard.

Usage for original Oplop algorithm (deprecated for new accounts)
Note: this will be implemented later, first implementation uses original Oplop algorithm

$ oplop -1
Enter account nickname: ******
Enter master password: ******
Your account password has been copied to the clipboard.