is it necessary to hardcode the user name and ID in the script for root?

[pmav99]

In the readme it is mentioned that in order to use the script for root you must hardcode the user name and the user id.

I think it is not really necessary to hardcode them. Is there something wrong with:

user_name=$(id -un)
user_id=$(id -u)
user_group=$(id -g)

echo "${user_name}"
echo "${user_id}"
echo "${user_group}"