Not able to generate long life access token

Hello Everyone, I am getting one error again and again when I create the long-life access token using the short-live access token
I am using GET API https://graph.instagram.com/access_token?grant_type=ig_exchange_token&access_token={TOKEN}&client_secret={INSTAGRAM_APP_SECRET}
But getting the below error every time {'error': {'message': 'Unsupported request - method type: get', 'type': 'IGApiException', 'code': 100, 'fbtrace_id': 'Awaqcn7Y2wsavS-DOz6lJu1'}}
Please help me out with this.