>=</span> <span class='fu'>determine_api_key</span><span class='op'>(</span><span class='op'>)</span>,
  <span class='va'>...</span>
<span class='op'>)</span></pre>

    <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
    <table class="ref-arguments">
    <colgroup><col class="name" /><col class="desc" /></colgroup>
    <tr>
      <th>request</th>
      <td><p>A request or path for the API, eg. "routes".</p></td>
    </tr>
    <tr>
      <th>user_id</th>
      <td