@ifenoiki, we have a work-in-progress feature that is very close to going live, which will transfer the project ownership. So with this feature, you should be able to transfer the project to another account from within the KoboToolbox environment. I will let you know once when it’s live.
But in the meantime, if you are in extreme need of the same, you could use our Python snippet that has already been shared in our forum previously: