title: Converting bitstring to string in Elixir
body: <p>I'm just new to Elixir.</p>
  
  <p>After generating a hmac hash, I got a <code>bitstring</code>:</p>
  
  <pre><code>:crypto.hmac(:sha512, secret, data)
  Sign: &lt;&lt;104, 155, 224, 193, 121, 129, 237, 103, 233, 236, 161, 130...&gt;&gt;
  </code></pre>
  
  <p>Now, I have to convert it to <code>String</code>, but don't know how exactly.</p>
  
  <p>Any Elixir/erlang module to do this directly?</p>