We added two small code changes to the official code repository (https://github.com/slaff/learnzf2). The first one is fixing a small typo in the TableGateway service from the User module and the second one is adding better documentation for using the final code with prefilled SQL database.
If you want to test it you can either do
git pull -f
or clone the changed source code in a new location
git clone https://github.com/slaff/learnzf2.git