If you do not create a web account, you cannot change password or register for a new ingame account. All players MUST have a web account.
After you have create a web account, you can add up to 5 ingame account in your web account.
For a complete tutorial you can view here
http://www.warfareonline.net/forum/how-to-sign-up-register-an-account-for-warfare-t6337.html