feat(auth): Add support for secret on OAuthCredential on web (#6830)

Co-authored-by: russellwheatley <[email protected]>

Author: 2 people

packages/firebase_auth/firebase_auth_platform_interface/lib/src/providers/oauth.dart

@@ -50,13 +50,15 @@ class OAuthProvider extends AuthProvider {
   /// Create a new [OAuthCredential] from a provided [accessToken];
   OAuthCredential credential({
     String? accessToken,
+    String? secret,
     String? idToken,
     String? rawNonce,
   }) {
     return OAuthCredential(
       providerId: providerId,
       signInMethod: 'oauth',
       accessToken: accessToken,
+      secret: secret,
       idToken: idToken,
       rawNonce: rawNonce,
     );

packages/firebase_auth/firebase_auth_platform_interface/test/providers_tests/oauth_test.dart

@@ -59,11 +59,13 @@ void main() {
 
     group('credential()', () {
       const String kMockAccessToken = 'test-token';
+      const String kMockSecret = 'test-secret';
       const String kMockIdToken = 'id';
       const String kMockRawNonce = 'test-raw-nonce';
       test('creates a new [OAuthCredential]', () {
         final result = oAuthProvider.credential(
             accessToken: kMockAccessToken,
+            secret: kMockSecret,
             idToken: kMockIdToken,
             rawNonce: kMockRawNonce);
 
@@ -72,6 +74,7 @@ void main() {
         expect(result.idToken, equals(kMockIdToken));
         expect(result.rawNonce, equals(kMockRawNonce));
         expect(result.accessToken, equals(kMockAccessToken));
+        expect(result.secret, equals(kMockSecret));
         expect(result.providerId, equals(kMockProviderId));
         expect(result.signInMethod, equals('oauth'));
       });

packages/firebase_auth/firebase_auth_web/lib/src/utils/web_utils.dart

@@ -212,6 +212,7 @@ AuthCredential? convertWebOAuthCredential(
 
   return OAuthProvider(oAuthCredential.providerId).credential(
     accessToken: oAuthCredential.accessToken,
+    secret: oAuthCredential.secret,
     idToken: oAuthCredential.idToken,
   );
 }