[firebase_auth] linkWithCredential() throws email-already-in-use exception in flutter app

Is there an existing issue for this?

[X] I have searched the existing issues.

Which plugins are affected?

Auth

Which platforms are affected?

Android, iOS

Description

I am using real mobile device with email enumeration protection and Gmail, email/password auth providers.

After signing in with gmail account, I tried to link email auth provider to the user account but I received email-already-in-use exception. This is the same exact issue that is described here #12156 with the exception that in this case I have enabled email enumeration protection.

I expect that the email auth provider should be linked to the user account so that the user can sign in with email/password or gmail.

@russellwheatley can you kindly check this out since you are already familiar with it.

Reproducing the issue

I followed the exact steps described over here.

Firebase Core version

3.1.1

Flutter Version

3.22.2

Relevant Log Output

No response

Flutter dependencies

Expand Flutter dependencies snippet

```yaml Dart SDK 3.4.3 Flutter SDK 3.22.2 oolfa 1.5.3+58 dependencies: - android_id 0.4.0 [flutter] - audio_waveforms 1.0.5 [flutter] - badges 3.1.2 [flutter] - cached_network_image 3.3.1 [cached_network_image_platform_interface cached_network_image_web flutter flutter_cache_manager octo_image] - carousel_slider 4.2.1 [flutter] - cloud_firestore 5.0.2 [cloud_firestore_platform_interface cloud_firestore_web collection firebase_core firebase_core_platform_interface flutter meta] - cloud_functions 5.0.2 [cloud_functions_platform_interface cloud_functions_web firebase_core firebase_core_platform_interface flutter] - connectivity_plus 6.0.3 [flutter flutter_web_plugins connectivity_plus_platform_interface web meta nm collection] - crypto 3.0.3 [typed_data] - cupertino_icons 1.0.8 - device_info_plus 10.1.0 [device_info_plus_platform_interface ffi file flutter flutter_web_plugins meta web win32 win32_registry] - dotted_border 2.1.0 [flutter path_drawing] - firebase_analytics 11.1.0 [firebase_analytics_platform_interface firebase_analytics_web firebase_core firebase_core_platform_interface flutter] - firebase_app_check 0.3.0+2 [firebase_app_check_platform_interface firebase_app_check_web firebase_core firebase_core_platform_interface flutter] - firebase_auth 5.1.1 [firebase_auth_platform_interface firebase_auth_web firebase_core firebase_core_platform_interface flutter meta] - firebase_core 3.1.1 [firebase_core_platform_interface firebase_core_web flutter meta] - firebase_crashlytics 4.0.2 [firebase_core firebase_core_platform_interface firebase_crashlytics_platform_interface flutter stack_trace] - firebase_database 11.0.2 [firebase_core firebase_core_platform_interface firebase_database_platform_interface firebase_database_web flutter] - firebase_messaging 15.0.2 [firebase_core firebase_core_platform_interface firebase_messaging_platform_interface firebase_messaging_web flutter meta] - firebase_remote_config 5.0.2 [firebase_core firebase_core_platform_interface firebase_remote_config_platform_interface firebase_remote_config_web flutter] - firebase_storage 12.1.0 [firebase_core firebase_core_platform_interface firebase_storage_platform_interface firebase_storage_web flutter] - firebase_ui_firestore 1.6.4 [cloud_firestore firebase_ui_localizations firebase_ui_shared flutter] - flash 3.1.1 [flutter] - flutter 0.0.0 [characters collection material_color_utilities meta vector_math sky_engine] - flutter_dotenv 5.1.0 [flutter] - flutter_facebook_auth 7.0.1 [flutter flutter_facebook_auth_platform_interface flutter_facebook_auth_web facebook_auth_desktop] - flutter_hooks 0.20.5 [flutter] - flutter_image_compress 2.3.0 [flutter flutter_image_compress_platform_interface flutter_image_compress_common flutter_image_compress_web flutter_image_compress_macos flutter_image_compress_ohos] - flutter_launcher_icons 0.13.1 [args checked_yaml cli_util image json_annotation path yaml] - flutter_local_notifications 17.2.1 [clock flutter flutter_local_notifications_linux flutter_local_notifications_platform_interface timezone] - flutter_localizations 0.0.0 [flutter intl characters clock collection material_color_utilities meta path vector_math] - flutter_slidable 3.1.0 [flutter] - flutter_svg 2.0.10+1 [flutter http vector_graphics vector_graphics_codec vector_graphics_compiler] - geocoding 3.0.0 [flutter geocoding_platform_interface geocoding_android geocoding_ios] - geolocator 12.0.0 [flutter geolocator_platform_interface geolocator_android geolocator_apple geolocator_web geolocator_windows] - go_router 14.2.0 [collection flutter flutter_web_plugins logging meta] - google_sign_in 6.2.1 [flutter google_sign_in_android google_sign_in_ios google_sign_in_platform_interface google_sign_in_web] - hooks_riverpod 2.5.1 [collection flutter flutter_hooks flutter_riverpod riverpod state_notifier] - http 1.2.1 [async http_parser meta web] - image_cropper 7.1.0 [flutter image_cropper_platform_interface image_cropper_for_web] - image_picker 1.1.2 [flutter image_picker_android image_picker_for_web image_picker_ios image_picker_linux image_picker_macos image_picker_platform_interface image_picker_windows] - intl 0.19.0 [clock meta path] - just_audio 0.9.38 [just_audio_platform_interface just_audio_web audio_session rxdart path path_provider async uuid crypto meta flutter] - mask_text_input_formatter 2.9.0 [flutter] - material_design_icons_flutter 7.0.7296 [flutter] - open_mail_app 0.4.5 [platform url_launcher flutter] - package_info_plus 8.0.0 [ffi flutter flutter_web_plugins http meta path package_info_plus_platform_interface web win32 clock] - path 1.9.0 - path_provider 2.1.3 [flutter path_provider_android path_provider_foundation path_provider_linux path_provider_platform_interface path_provider_windows] - permission_handler 11.3.1 [flutter meta permission_handler_android permission_handler_apple permission_handler_html permission_handler_windows permission_handler_platform_interface] - photo_view 0.15.0 [flutter] - purchases_flutter 6.29.4 [flutter freezed_annotation json_annotation] - rate_my_app 2.2.0 [shared_preferences flutter_rating_bar flutter] - rxdart 0.27.7 - scrollable_positioned_list 0.3.8 [flutter collection] - share_plus 9.0.0 [cross_file meta mime flutter flutter_web_plugins share_plus_platform_interface file url_launcher_web url_launcher_windows url_launcher_linux url_launcher_platform_interface ffi web win32] - shared_preferences 2.2.3 [flutter shared_preferences_android shared_preferences_foundation shared_preferences_linux shared_preferences_platform_interface shared_preferences_web shared_preferences_windows] - shimmer 3.0.0 [flutter] - showcaseview 3.0.0 [flutter] - stack_trace 1.11.1 [path] - store_redirect 2.0.2 [flutter] - swipe_to 1.0.6 [flutter] - timeago 3.6.1 [intl] - url_launcher 6.3.0 [flutter url_launcher_android url_launcher_ios url_launcher_linux url_launcher_macos url_launcher_platform_interface url_launcher_web url_launcher_windows] - uuid 4.4.0 [crypto sprintf meta fixnum] - webview_flutter 4.8.0 [flutter webview_flutter_android webview_flutter_platform_interface webview_flutter_wkwebview] dev dependencies: - flutter_test 0.0.0 [flutter test_api matcher path fake_async clock stack_trace vector_math leak_tracker_flutter_testing async boolean_selector characters collection leak_tracker leak_tracker_testing material_color_utilities meta source_span stream_channel string_scanner term_glyph vm_service] - flutter_web_plugins 0.0.0 [flutter characters collection material_color_utilities meta vector_math] - mocktail 1.0.4 [collection matcher test_api] - very_good_analysis 6.0.0 transitive dependencies: - _flutterfire_internals 1.3.38 [collection firebase_core firebase_core_platform_interface flutter meta] - archive 3.6.1 [crypto path] - args 2.5.0 - async 2.11.0 [collection meta] - audio_session 0.1.19 [flutter flutter_web_plugins rxdart meta] - boolean_selector 2.1.1 [source_span string_scanner] - cached_network_image_platform_interface 4.0.0 [flutter flutter_cache_manager] - cached_network_image_web 1.2.0 [cached_network_image_platform_interface flutter flutter_cache_manager] - characters 1.3.0 - checked_yaml 2.0.3 [json_annotation source_span yaml] - cli_util 0.4.1 [meta path] - clock 1.1.1 - cloud_firestore_platform_interface 6.2.8 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - cloud_firestore_web 4.0.2 [_flutterfire_internals cloud_firestore_platform_interface collection firebase_core firebase_core_web flutter flutter_web_plugins] - cloud_functions_platform_interface 5.5.31 [firebase_core flutter meta plugin_platform_interface] - cloud_functions_web 4.9.9 [cloud_functions_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins] - collection 1.18.0 - connectivity_plus_platform_interface 2.0.0 [flutter meta plugin_platform_interface] - cross_file 0.3.4+1 [meta web] - dbus 0.7.10 [args ffi meta xml] - device_info_plus_platform_interface 7.0.0 [flutter meta plugin_platform_interface] - facebook_auth_desktop 2.0.0 [flutter http flutter_secure_storage flutter_facebook_auth_platform_interface] - fake_async 1.3.1 [clock collection] - ffi 2.1.2 - file 7.0.0 [meta path] - file_selector_linux 0.9.2+1 [cross_file file_selector_platform_interface flutter] - file_selector_macos 0.9.4 [cross_file file_selector_platform_interface flutter] - file_selector_platform_interface 2.6.2 [cross_file flutter http plugin_platform_interface] - file_selector_windows 0.9.3+1 [cross_file file_selector_platform_interface flutter] - firebase_analytics_platform_interface 4.1.0 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_analytics_web 0.5.8 [_flutterfire_internals firebase_analytics_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins] - firebase_app_check_platform_interface 0.1.0+32 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_app_check_web 0.1.2+10 [_flutterfire_internals firebase_app_check_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins web] - firebase_auth_platform_interface 7.4.1 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_auth_web 5.12.3 [firebase_auth_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins http_parser meta web] - firebase_core_platform_interface 5.1.0 [collection flutter flutter_test meta plugin_platform_interface] - firebase_core_web 2.17.2 [firebase_core_platform_interface flutter flutter_web_plugins meta web] - firebase_crashlytics_platform_interface 3.6.38 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_database_platform_interface 0.2.5+38 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_database_web 0.2.5+10 [collection firebase_core firebase_core_web firebase_database_platform_interface flutter flutter_web_plugins] - firebase_messaging_platform_interface 4.5.40 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_messaging_web 3.8.10 [_flutterfire_internals firebase_core firebase_core_web firebase_messaging_platform_interface flutter flutter_web_plugins meta web] - firebase_remote_config_platform_interface 1.4.38 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_remote_config_web 1.6.10 [firebase_core firebase_core_web firebase_remote_config_platform_interface flutter flutter_web_plugins] - firebase_storage_platform_interface 5.1.25 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_storage_web 3.9.10 [_flutterfire_internals async firebase_core firebase_core_web firebase_storage_platform_interface flutter flutter_web_plugins http meta web] - firebase_ui_localizations 1.12.0 [flutter flutter_localizations path] - firebase_ui_shared 1.4.1 [flutter] - fixnum 1.1.0 - flutter_cache_manager 3.3.1 [clock collection file flutter http path path_provider rxdart sqflite uuid] - flutter_facebook_auth_platform_interface 6.0.0 [flutter plugin_platform_interface] - flutter_facebook_auth_web 6.0.0 [flutter flutter_web_plugins js flutter_facebook_auth_platform_interface] - flutter_image_compress_common 1.0.5 [flutter flutter_image_compress_platform_interface] - flutter_image_compress_macos 1.0.2 [flutter flutter_image_compress_platform_interface] - flutter_image_compress_ohos 0.0.3 [flutter flutter_image_compress_platform_interface] - flutter_image_compress_platform_interface 1.0.5 [flutter plugin_platform_interface cross_file] - flutter_image_compress_web 0.1.4+1 [flutter flutter_web_plugins flutter_image_compress_platform_interface js] - flutter_local_notifications_linux 4.0.0+1 [dbus ffi flutter flutter_local_notifications_platform_interface path xdg_directories] - flutter_local_notifications_platform_interface 7.2.0 [flutter plugin_platform_interface] - flutter_plugin_android_lifecycle 2.0.20 [flutter] - flutter_rating_bar 4.0.1 [flutter] - flutter_riverpod 2.5.1 [collection flutter meta riverpod state_notifier] - flutter_secure_storage 9.2.2 [flutter flutter_secure_storage_linux flutter_secure_storage_macos flutter_secure_storage_platform_interface flutter_secure_storage_web flutter_secure_storage_windows meta] - flutter_secure_storage_linux 1.2.1 [flutter flutter_secure_storage_platform_interface] - flutter_secure_storage_macos 3.1.2 [flutter flutter_secure_storage_platform_interface] - flutter_secure_storage_platform_interface 1.1.2 [flutter plugin_platform_interface] - flutter_secure_storage_web 1.2.1 [flutter flutter_secure_storage_platform_interface flutter_web_plugins js] - flutter_secure_storage_windows 3.1.2 [ffi flutter flutter_secure_storage_platform_interface path path_provider win32] - freezed_annotation 2.4.1 [collection json_annotation meta] - geocoding_android 3.3.1 [flutter geocoding_platform_interface] - geocoding_ios 3.0.1 [flutter geocoding_platform_interface] - geocoding_platform_interface 3.2.0 [flutter meta plugin_platform_interface] - geolocator_android 4.6.0 [flutter geolocator_platform_interface meta uuid] - geolocator_apple 2.3.7 [flutter geolocator_platform_interface] - geolocator_platform_interface 4.2.4 [flutter plugin_platform_interface vector_math meta] - geolocator_web 4.0.0 [flutter flutter_web_plugins geolocator_platform_interface web] - geolocator_windows 0.2.3 [flutter geolocator_platform_interface] - google_identity_services_web 0.3.1+1 [meta web] - google_sign_in_android 6.1.26 [flutter google_sign_in_platform_interface] - google_sign_in_ios 5.7.6 [flutter google_sign_in_platform_interface] - google_sign_in_platform_interface 2.4.5 [flutter plugin_platform_interface] - google_sign_in_web 0.12.3+3 [flutter flutter_web_plugins google_identity_services_web google_sign_in_platform_interface http web] - http_parser 4.0.2 [collection source_span string_scanner typed_data] - image 4.2.0 [archive meta xml] - image_cropper_for_web 5.1.0 [flutter flutter_web_plugins image_cropper_platform_interface web] - image_cropper_platform_interface 6.1.0 [flutter plugin_platform_interface http] - image_picker_android 0.8.12+3 [flutter flutter_plugin_android_lifecycle image_picker_platform_interface] - image_picker_for_web 3.0.2 [flutter flutter_web_plugins image_picker_platform_interface mime] - image_picker_ios 0.8.12 [flutter image_picker_platform_interface] - image_picker_linux 0.2.1+1 [file_selector_linux file_selector_platform_interface flutter image_picker_platform_interface] - image_picker_macos 0.2.1+1 [file_selector_macos file_selector_platform_interface flutter image_picker_platform_interface] - image_picker_platform_interface 2.10.0 [cross_file flutter http plugin_platform_interface] - image_picker_windows 0.2.1+1 [file_selector_platform_interface file_selector_windows flutter image_picker_platform_interface] - js 0.6.7 [meta] - json_annotation 4.9.0 [meta] - just_audio_platform_interface 4.3.0 [flutter plugin_platform_interface] - just_audio_web 0.4.11 [just_audio_platform_interface flutter flutter_web_plugins web] - leak_tracker 10.0.4 [clock collection meta path vm_service] - leak_tracker_flutter_testing 3.0.3 [flutter leak_tracker leak_tracker_testing matcher meta] - leak_tracker_testing 3.0.1 [leak_tracker matcher meta] - logging 1.2.0 - matcher 0.12.16+1 [async meta stack_trace term_glyph test_api] - material_color_utilities 0.8.0 [collection] - meta 1.12.0 - mime 1.0.5 - nm 0.5.0 [dbus] - octo_image 2.0.0 [flutter] - package_info_plus_platform_interface 3.0.0 [flutter meta plugin_platform_interface] - path_drawing 1.0.1 [vector_math meta path_parsing flutter] - path_parsing 1.0.1 [vector_math meta] - path_provider_android 2.2.6 [flutter path_provider_platform_interface] - path_provider_foundation 2.4.0 [flutter path_provider_platform_interface] - path_provider_linux 2.2.1 [ffi flutter path path_provider_platform_interface xdg_directories] - path_provider_platform_interface 2.1.2 [flutter platform plugin_platform_interface] - path_provider_windows 2.2.1 [ffi flutter path path_provider_platform_interface win32] - permission_handler_android 12.0.7 [flutter permission_handler_platform_interface] - permission_handler_apple 9.4.5 [flutter permission_handler_platform_interface] - permission_handler_html 0.1.1 [flutter flutter_web_plugins permission_handler_platform_interface] - permission_handler_platform_interface 4.2.1 [flutter meta plugin_platform_interface] - permission_handler_windows 0.2.1 [flutter permission_handler_platform_interface] - petitparser 6.0.2 [meta] - platform 3.1.5 - plugin_platform_interface 2.1.8 [meta] - riverpod 2.5.1 [collection meta stack_trace state_notifier] - share_plus_platform_interface 4.0.0 [cross_file flutter meta mime plugin_platform_interface path_provider uuid] - shared_preferences_android 2.2.3 [flutter shared_preferences_platform_interface] - shared_preferences_foundation 2.4.0 [flutter shared_preferences_platform_interface] - shared_preferences_linux 2.3.2 [file flutter path path_provider_linux path_provider_platform_interface shared_preferences_platform_interface] - shared_preferences_platform_interface 2.3.2 [flutter plugin_platform_interface] - shared_preferences_web 2.3.0 [flutter flutter_web_plugins shared_preferences_platform_interface web] - shared_preferences_windows 2.3.2 [file flutter path path_provider_platform_interface path_provider_windows shared_preferences_platform_interface] - sky_engine 0.0.99 - source_span 1.10.0 [collection path term_glyph] - sprintf 7.0.0 - sqflite 2.3.3+1 [flutter sqflite_common path] - sqflite_common 2.5.4 [synchronized path meta] - state_notifier 1.0.0 [meta] - stream_channel 2.1.2 [async] - string_scanner 1.2.0 [source_span] - synchronized 3.1.0+1 - term_glyph 1.2.1 - test_api 0.7.0 [async boolean_selector collection meta source_span stack_trace stream_channel string_scanner term_glyph] - timezone 0.9.4 [path] - typed_data 1.3.2 [collection] - url_launcher_android 6.3.3 [flutter url_launcher_platform_interface] - url_launcher_ios 6.3.0 [flutter url_launcher_platform_interface] - url_launcher_linux 3.1.1 [flutter url_launcher_platform_interface] - url_launcher_macos 3.2.0 [flutter url_launcher_platform_interface] - url_launcher_platform_interface 2.3.2 [flutter plugin_platform_interface] - url_launcher_web 2.3.1 [flutter flutter_web_plugins url_launcher_platform_interface web] - url_launcher_windows 3.1.1 [flutter url_launcher_platform_interface] - vector_graphics 1.1.11+1 [flutter http vector_graphics_codec] - vector_graphics_codec 1.1.11+1 - vector_graphics_compiler 1.1.11+1 [args meta path_parsing xml vector_graphics_codec path] - vector_math 2.1.4 - vm_service 14.2.1 - web 0.5.1 - webview_flutter_android 3.16.4 [flutter webview_flutter_platform_interface] - webview_flutter_platform_interface 2.10.0 [flutter meta plugin_platform_interface] - webview_flutter_wkwebview 3.13.1 [flutter path webview_flutter_platform_interface] - win32 5.5.1 [ffi] - win32_registry 1.1.3 [ffi win32] - xdg_directories 1.0.4 [meta path] - xml 6.5.0 [collection meta petitparser] - yaml 3.1.2 [collection source_span string_scanner] ```

Additional context and comments

No response

firebase / flutterfire