In Symfony, Service classes generally are used to hold code that performs repeatable tasks. For example, say you needed to format a phone number. You would make a service class with a method that formats the phone number as opposed to copying and pasting the same bit of code around each time you needed to format a phone number. Services are also a good place to store your business logic code. Code that doesn’t really belong in your controller, entity or repository classes. So far we’ve built out an API which lets a user register, login and see their account