Ch 4 Possible Corrections under Symfony:
Code in book ch 4 (pg 95) differs from code in examples. In pg. 91 under 'Project Requirements', it said only one table is to be created, which is the "Address" Table. Following the steps very closely does not produce the same code as the book, however, it produces the code from the example.
Therefore I believe the author accidentally wrote 'User' when it should be 'Addresses'.