When you open the TorGuard desktop or mobile app, you are met with two empty fields. Here, you paste the system-generated username and the password you created during checkout. Upon success, the application fetches a subscription status and unlocks a sprawling menu of protocols (OpenVPN, WireGuard, IKEv2). This login is strictly for routing traffic . It does not grant access to billing or account settings.
This is the #1 mistake. Your email is only for the billing portal. Your VPN login username was emailed to you when you signed up. Look for an email titled "Your New Account Information."