scripts: Fix error handling for command users.merge
scripts: Fix error handling for command users.merge

RBE-Avionik/skylines,Harry-R/skylines,Turbo87/skylines,skylines-project/skylines,Turbo87/skylines,skylines-project/skylines,RBE-Avionik/skylines,Turbo87/skylines,Harry-R/skylines,Harry-R/skylines,Turbo87/skylines,skylines-project/skylines,Harry-R/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,skylines-project/skylines