title: Getting 403 Error on Calling GET Rest API
body: <p>As per API Documentation, the Curl is:</p>
  <pre><code>curl -X GET &quot;https://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByPin?pincode=110001&amp;date=31-03-2021&quot; -H &quot;accept: application/json&quot; -H &quot;Accept-Language: hi_IN&quot;
  </code></pre>
  <p>My PHP Script:</p>
  <pre><code>$url='https://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByPin?pincode='.$pincode.'&amp;date='.$tomorrow;
  $curl = curl_init($url);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($curl, CURLOPT_HTTPHEADER, [
      'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36',
      'Content-Type: application/json',
      'accept: application/json',
      'Accept-Language: hi_IN'
  ]);
  $response = curl_exec($curl);
  $curl_error = curl_errno($curl);
  curl_close($curl);
  echo $response . PHP_EOL;
  </code></pre>
  <p>When I run my PHP Script, I'm getting this 403 Error:
  <a href="https://i.stack.imgur.com/UlF93.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UlF93.png" alt="enter image description here" /></a></p>
  <p>Is there anything wrong with my PHP Script?</p>