The API Platform setup we're using - aka the default provided via
docker-compose.yaml - runs a Postgres DB. In the two previous Symfony 4 API implementations we were using MySQL. As such, our
cleanUpDatabase function expects a MySQL DB. And that's not to mention all the credentials are incorrect.
This is a companion discussion topic for the original entry at https://codereviewvideos.com/course/beginners-guide-back-end-json-api-front-end-2018/video/starting-post-api-platform