I am trying to make a post from postman to the server. Everything seems alright but when I attempt to make a post it returns an error as shown 

```
<th align='left' bgcolor='#f57900' colspan="5">
                <span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Notice: Undefined index: name in Upload-Download-PDF-File-Demo\upload.php on line
                <i>27</i>
            </th>

```

Here is the snippet on the php file

```
$response = array();
if($_SERVER['REQUEST_METHOD']=='POST'){

    //checking the required parameters from the request

        //connecting to the database
        //$con = mysqli_connect(DB_HOST,DB_USERNAME,DB_PASSWORD,DB_NAME) or die('Unable to Connect...');
        $con = mysqli_connect(HOST,USER,PASS,DB) or die('Unable to Connect...');

        //getting name from the request
        $name = $_POST['name'];

```

[Here is a picture on my attempt from postman](https://i.stack.imgur.com/Gfq9I.png)

This is my first time experiencing this type of error. Please what could be wrong