fix ctor

Author: t5ujiri

README.md

@@ -15,7 +15,6 @@ main() {
   
   var cloudStorageSigner = CloudStorageSigner(
     serviceAccountCredentials: credential,
-    serviceAccountEmailOrId: serviceAccountName,
   );
 
   var url = await cloudStorageSigner.generateSignedUrl(

lib/src/cloud_storage_signer_base.dart

@@ -10,12 +10,10 @@ import 'package:path/path.dart' as path;
 
 class CloudStorageSigner {
   final auth.ServiceAccountCredentials serviceAccountCredentials;
-  final String serviceAccountEmailOrId;
   final RS256Signer signer;
 
   CloudStorageSigner({
     required this.serviceAccountCredentials,
-    required this.serviceAccountEmailOrId,
   }) : signer = RS256Signer(serviceAccountCredentials.privateRSAKey);
 
   Future<String> generateSignedUrl({

test/cloud_storage_signer_test.dart

@@ -14,7 +14,6 @@ void main() async {
     test('generate post url', () async {
       var cloudStorageSigner = CloudStorageSigner(
         serviceAccountCredentials: credential,
-        serviceAccountEmailOrId: credential.email,
       );
 
       var url = await cloudStorageSigner.generateSignedUrl(