curl --location --request POST 'https://api.febbox.com/oauth/token' \ --data-urlencode 'client_id=client_id' \ --data-urlencode 'client_secret=client_secret' \ --data-urlencode 'grant_type=client_credentials' \ --data-urlencode 'refresh_token=refresh_token'
{ "code": 0, "msg": "string", "data": { "access_token": "string", "expires_in": 0, "token_type": "string", "scope": null, "refresh_token": "string" } }