title: Swift 3 - SwiftKeychainWrapper: KeychainWrapper.standard.set not persistent
body: <p>I have installed <a href="https://github.com/jrendel/SwiftKeychainWrapper" rel="nofollow">SwiftKeychainWrapper</a> on my swift 3 project.</p>
  
  <p>I use the following method to save a value on a given key:</p>
  
  <pre><code>let saveSuccessful: Bool = KeychainWrapper.standard.set("hello", forKey: "world")
  </code></pre>
  
  <p>When checking the result of the boolean variable, it is false.</p>
  
  <p>And when I try retrieve the value for the key above as follow:</p>
  
  <pre><code>KeychainWrapper.standard.string(forKey: "world")
  </code></pre>
  
  <p>the result is nil of course.</p>
  
  <p>Any idea what I am doing wrong?</p>
  
  <p>No bug detected at all during the process by xCode.</p>
  
  <p>Thank you for your help.</p>