title: Hook into Umbraco Forms submission
body: <p>I want to check for an existing record with the email address before submitting the form and saving the record. I did some research and most suggested using RecordService.RecordSubmitted event, however when I checked the Form.Core.Services I couldn't see any RecordService. </p>
  
  <p>Is there any alternative way to hook into that event.</p>
  
  <p>I am using Umbraco 7.4.3 and forms 4.3.2</p>