2nd level of password to access computer

I am a new user of TeamViewer.  I have a computer (A) that I want to access remotely.  I created an account with TeamViewer, which uses my email and a password.  I also set up a password for the computer that I wanted to access remotely (Unattended Access).  When using another computer (B) to remotely control computer A, it does not ask for a password other than for logging into my account.  How can I force TeamViewer to ask for the computer-level password (essentially requiring me to type two different passwords in, which I presume helps with security)?