This is a feature, not a bug. It ensures that no government or hacker can force Proton to hand over your account access.
By understanding the difference between your master account credentials and your dedicated OpenVPN credentials, you will never be locked out of your secure tunnel again. Stay private, stay secure. protonvpn username and password
These are the username and password you create during sign-up on the Proton VPN website This is a feature, not a bug