Zend certified PHP/Magento developer

set system time without password

I have a (generally) off-network machine that has time info streaming through serial from GPS. I’ve captured that info and I’m trying to automatically update my system time using timedatectl set-time and it keeps asking me for a password. I’ve gathered that I’m supposed to be updating the sudoers file, but I’m figuring that my formatting is wrong. here’s what I have and it still asks me for the password. I appreciate any feedback.

MyUserName ALL=(ALL) NOPASSWD: /user/bin/timedatectl