If your invitation link you received when you were signing up for True has now expired, the best way to get around this is by using the 'Forgot Password' tool.
Head to the 'Forgot Password' page and enter the email address you used when you signed up.
Once you click 'Confirm', you should then receive an email with instructions for how to reset your password.
Don't forget to check your spam folder, just in case you don't receive it in your inbox within a minute or so.