  <colgroup><col class="name" /><col class="desc" /></colgroup>
    <tr>
      <th>user_id</th>
      <td><p>numeric; the unique id to identify an Instagram user which can be 
found in the <code>"pk"</code> field on a <code>user</code> object</p></td>
    </tr>
    <tr>
      <th>max_id</th>
      <td><p>integer; the unique id identifying the oldest post that you 
would want to retrieve in this function call</p></td>
    </tr>
    <tr>
      <th>return_df</th>
      <td><p>logical; do you want to return the