title: How do I grant access to a registration page only for users given a certain link within an e-mail?
body: <p>I am using swift mailer and I want to provide a link in the e-mail that leads to an account registration page.</p>
  
  <p>I only want to grant access to the user has the link in the email, but make sure that no one can go to the registration page typing in the path to the URL bar.</p>
  
  <p>I researched and learned about using some kind of access token but have been stuck for a while.</p>