[4/4] Symfony 3 Contact Form - Beginner Friendly Symfony 3

In this video we are continuing on with our Contact / Support form implementation, this time concerning ourselves with actually handling the submitted form. By the end of this video we will have covered: * how to accept a Symfony form submission * how to extract data from a Symfony form submission * how to create and dispatch an email using Symfony and SwiftMailer * ways to start debugging if / when things go wrong To begin working with a form submission, the very first thing we need to do is ensure that we have injected the `Request` object into our Controller action.