title: var request: Alamofire.Request? Use of undeclared type Alamofire
body: <p>I'm converting my swift 2.2 code to swift3 code in Xcode 8 and I have this line:</p>
  
  <pre><code>var request: Alamofire.Request?
  </code></pre>
  
  <p>which is producing this error:</p>
  
  <pre><code>Use of undeclared type Alamofire. 
  </code></pre>
  
  <p>How can I fix this error? I have read the migration guide but I don't see anything which helps me. I am using Alamofire 4.0.1</p>