title: Google API - How do I get alias emails for a user?
body: <p><strong>Question</strong></p>
  
  <p>Using Google Apps OAuth for authentication, how can I retrieve a user's email aliases?</p>
  
  <p>I can't seem to find any API docs on how to do this. What are the necessary scopes and what is the correct call to get that info?</p>
  
  <p><strong>Why</strong></p>
  
  <p>Let's say I have a user Alice that invites <code>bob@company.com</code> to use the app. Unfortunately, <code>bob@company.com</code> is actually an alias for <code>bob.jones@company.com</code>. When Bob logs into the service with Google OAuth, Google tells me his email address is <code>bob.jones@company.com</code>. Now I have accidentally created two accounts for Bob when I want to recognize them as the same account.</p>