X-User-Token: ********************curl --location 'https://api.flashcat.cloud/api/n9e/auth/callback?code=undefined&state=undefined' \
--header 'X-User-Token: <api-key>'{
"dat": {
"redirect": "string",
"user": {},
"access_token": "string",
"refresh_token": "string"
},
"err": "string"
}