An error is indicated when calling a get request to obtain a long-lived access token

That's my get request url https://graph.instagram.com/v20.0/access_token?grant_type=ig_exchange_token&client_secret=***&access_token={{access_token}}

That's my error { "error": { "message": "Unsupported request - method type: get", "type": "IGApiException", "code": 100, "fbtrace_id": "Ac_rq4FxAoLndsITcAeGn0I" } }

Short access token is coming