title: How do i get "sed" to delete everything else but email address.
body: <p>how do i get "sed" to delete everything else but email address. </p>
  
  <pre><code>db dump: someusername ::: kRW...0fPc ::: $2a$10$...aucvkDt86 ::: joesmith@gmail.com
  </code></pre>