Did you loose your password for WorkReg, then use the option 'Forgot password' to recover your password. For a password recovery you need access to the e-mail you used for registering.
Do you want to change your password for WorkReg, then use the option 'Change password' to change your password. You need your current account details to change your password.
Do you want to change your username for WorkReg, then use the option 'Change username' to change your username. You need your current account details to change your username.