title: Twilio API POST request
body: <p>I was wondering if someone could help me. I am trying to use Twilio's REST API and I'm running into some trouble.</p>
  <p>I tried to send data through Postman but I get an error message:</p>
  <pre><code>{
      &quot;code&quot;: 21603,
      &quot;message&quot;: &quot;A 'From' phone number is required.&quot;,
      &quot;more_info&quot;: &quot;https://www.twilio.com/docs/errors/21603&quot;,
      &quot;status&quot;: 400
  }
  </code></pre>
  <p>But I have given all the credentials correctly:</p>
  <p><a href="https://i.stack.imgur.com/Uq72N.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Uq72N.png" alt="screenshot" /></a></p>