[m-users.] [Beginner] Using a functions from 'libs'

[Razetime]

I require the md5 hashing function for solving a problem. I found an
implementation at
https://github.com/Mercury-Language/mercury/blob/master/compiler/md5.m

but I  am not able to import it with the name `libs' or `libs.md5'.
How do I do so?