Rewrite cfg file in .sh file

I'd like to rewrite the cfg file in a different directory than the one where the sh file is stored. What can I do about it?

Currently
./usercreate.sh
cd to /airflow
sed-i-e"4c\dags_folder=/home/test2/dags"airflow.cfg

I'm doing it in the form of
but I'm also doing it in the last two lines. I would like to write it down in usercreate.sh.