How to switch repo?

[lxylxy123456]

I am following the tutorial in http://www.bugswarm.org/docs/tutorials/setting-up-an-experiment/.

When running an artifact with bugswarm run --image-tag nutzam-nutz-140438299 --use-sandbox, the repo bugswarm/images is used (which is set in .../site-packages/bugswarm/common/credentials.py), but how can I switch to another repo (say https://hub.docker.com/repository/docker/lxylxy123456/bugswarm-repo)?

Is there a standard procedure for editing credentials.py? Or maybe we can add a command line argument.