command with file contents as parameter

RouterOS Scripting
1

If I want to change the guest password I do

ip hotspot user set guest password=hello

but is it possible to use the contents of a file as parameter?
/guest_password.txt containing

hello

and use something like

ip hotspot user set guest password={guest_password.txt}
2

You can get the file contents into a variable, and use the variable.

e.g.

:local guestPassword [/file get guest_password.txt contents];
/ip hotspot user set guest password=$guestPassword;

Or if you insist on omitting the variable:

/ip hotspot user set guest password=[/file get guest_password.txt contents];
3

Thanks!