How to get Laravel Passport authorization access token response in XML format

How to convert the Laravel Passport rest API package authorization access token response in XML format.

Laravel Version: 5.4, Laravel/Passport version: 4.0.3

e.g. Suppose when calling the API url https://ift.tt/2Q7ZIrL using the postman getting response in JSON format like

{
"token_type": "Bearer",
"expires_in": 31536000,
"access_token": "xxxxxxxxxxxxxxxxxxxxxxxx",
"refresh_token": "xxxxxxxxxxxxxxxxxxxxxxxx"
}

I want to change this output response in XML format like

<?xml version="1.0" encoding="UTF-8"?>
<root>
   <access_token>xxxxxxxxxxxxxxxxxxxxxxxx</access_token>
   <expires_in>31536000</expires_in>
   <refresh_token>xxxxxxxxxxxxxxxxxxxxxxxx</refresh_token>
   <token_type>Bearer</token_type>
</root>

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