n class="nv">payload</span><span class="p">:</span> <span class="kt"><a href="../Protocols/UpdateChallengePayload.html">UpdateChallengePayload</a></span><span class="p">,</span> <span class="nv">success</span><span class="p">:</span> <span class="kd">@escaping</span> <span class="kt">EmptySuccessBlock</span><span class="p">,</span> <span class="nv">failure</span><span class="p">:</span> <span class="kd">@escaping</span> <span class="kt">TwilioVerifyErrorBlock</span><span class="p">)</span></code></pre>

   