[NEST Users] nest user in nest-docker entrypoint file

Hi all, I have a question about nest user creation/usage in nest docker entrypoint file: I am working with Sarus and Singularity and due to some permission limits I can't create a new user inside a container. I have tried to modify the entrypoint.sh file as follows https://github.com/ChristopherBignamini/nest-docker/blob/no_nest_user_creat… in order to skip the creation of the nest user. I am not a nest expert but everything seems to work, at least if I try to run a couple of examples like one_neuron.py and twoneurons.py. My question is: what is the reason behind the creation and usage of the nest user? Thank you in advance. Cheers Christopher