void openAuthorizationUrl() async {
final clientId = 'cd3acde01...da7efbc';
final redirectUri = 'https://localhost:8888/callback';
final scope = 'user-read-private user-read-email user-top-read';
final response_type = 'code';
final authorizationUrl =
'https://accounts.spotify.com/authorize?response_type=$response_type&client_id=$clientId&scope=$scope&redirect_uri=$redirectUri';
if (await canLaunchUrl(Uri.parse(authorizationUrl))) {
var x = await launchUrl(Uri.parse(authorizationUrl));
} else {
throw 'Could not launch $authorizationUrl';
}
}