you can use it here, but you need to replace {name-of-tutorial} with the name of the tutorial, then postbot will send you a message
for the random number generato you need to write @postbot roll xdy where y is the total number of possibilities, or the number of faces on the die, and x is the number of extractions, or number of dies. So to extract 2 numbers from 1-6 you write @postbot roll 2d6