Device serial number for ADB commands

I'm using an automation platform that has an ADB session which requires the "device_serial_list", which is the serial number.
However, if I do "adb get-serialno" I get a different value than the one shown in this website so I'm not sure what should be the one to use in this case.

from DroidForums.net | Android Forums & News https://ift.tt/2JlVrgp
via IFTTT