[firebase_auth]: Apple Sign In shows wrong native UI

[Daeon97]

Is there an existing issue for this?

• I have searched the existing issues.

Which plugins are affected?

Auth

Which platforms are affected?

iOS

Description

On iOS, it is expected that the first time the user tries to sign in with Apple they are shown UI that allows them to select whether they want to share or hide their email 👇🏾

Instead Firebase Auth shows this UI for first time Apple Sign In

I am quite confused as to why this may be happening, perhaps I am missing something

Reproducing the issue

• Sign in to iCloud on iPhone
• Launch a clean install of the app
• Click 'Continue with Apple' (User is a fresh user and did not exists on Firebase Auth. isNewUser field returned is true
• UI shown is UI for returning user and does not have option to hide email

Firebase Core version

4.1.1

Flutter Version

3.35.5

Relevant Log Output

Flutter dependencies

Expand Flutter dependencies snippet

Dart SDK 3.9.2
Flutter SDK 3.35.5
sky_trade 0.2.8+17

dependencies:
- app_tracking_transparency 2.0.6+1 [flutter]
- auth0_flutter 1.12.0 [auth0_flutter_platform_interface flutter flutter_web_plugins web]
- awesome_notifications 0.10.1 [flutter flutter_web_plugins plugin_platform_interface intl]
- awesome_notifications_core 0.10.1 [flutter flutter_web_plugins plugin_platform_interface]
- bloc 9.0.0 [meta]
- bloc_test 10.0.0 [bloc diff_match_patch meta mocktail test]
- cached_network_image 3.4.1 [cached_network_image_platform_interface cached_network_image_web flutter flutter_cache_manager octo_image]
- clarity_flutter 1.2.0 [flutter path_provider json_annotation package_info_plus device_info_plus image]
- collection 1.19.1
- cupertino_icons 1.0.8
- dart_geohash 2.1.0
- dartz 0.10.1
- device_info_plus 11.5.0 [device_info_plus_platform_interface ffi file flutter flutter_web_plugins meta web win32 win32_registry]
- dio 5.8.0+1 [async collection http_parser meta path dio_web_adapter]
- equatable 2.0.7 [collection meta]
- firebase_analytics 12.0.2 [firebase_analytics_platform_interface firebase_analytics_web firebase_core firebase_core_platform_interface flutter]
- firebase_auth 6.1.0 [firebase_auth_platform_interface firebase_auth_web firebase_core firebase_core_platform_interface flutter meta]
- firebase_core 4.1.1 [firebase_core_platform_interface firebase_core_web flutter meta]
- firebase_crashlytics 5.0.2 [firebase_core firebase_core_platform_interface firebase_crashlytics_platform_interface flutter stack_trace]
- flutter 0.0.0 [characters collection material_color_utilities meta vector_math sky_engine]
- flutter_background_service 5.1.0 [flutter flutter_background_service_platform_interface flutter_background_service_android flutter_background_service_ios]
- flutter_bloc 9.1.1 [bloc flutter provider]
- flutter_blue_plus 1.35.5 [flutter flutter_blue_plus_android flutter_blue_plus_darwin flutter_blue_plus_linux flutter_blue_plus_platform_interface flutter_blue_plus_web]
- flutter_dotenv 5.2.1 [flutter]
- flutter_localizations 0.0.0 [flutter intl path]
- flutter_native_splash 2.4.5 [args flutter flutter_web_plugins html image meta path universal_io xml yaml ansicolor]
- flutter_opendroneid 0.22.1 [flutter permission_handler device_info_plus dart_opendroneid]
- flutter_secure_storage 9.2.4 [flutter flutter_secure_storage_linux flutter_secure_storage_macos flutter_secure_storage_platform_interface flutter_secure_storage_web flutter_secure_storage_windows meta]
- flutter_svg 2.1.0 [flutter http vector_graphics vector_graphics_codec vector_graphics_compiler]
- freezed_annotation 2.4.4 [collection json_annotation meta]
- geodart 0.3.7
- geolocator 14.0.0 [flutter geolocator_platform_interface geolocator_android geolocator_apple geolocator_web geolocator_windows]
- get_it 8.0.3 [async collection meta]
- go_router 16.1.0 [collection flutter flutter_web_plugins logging meta]
- google_sign_in 7.1.1 [flutter google_sign_in_android google_sign_in_ios google_sign_in_platform_interface google_sign_in_web]
- hive_ce 2.11.2 [meta crypto web isolate_channel json_annotation]
- hive_ce_flutter 2.3.1 [flutter hive_ce path_provider path]
- hydrated_bloc 10.0.0 [bloc hive_ce meta synchronized]
- intl 0.20.2 [clock meta path]
- intl_phone_field 3.2.0 [flutter]
- json_annotation 4.9.0 [meta]
- logger 2.5.0
- mapbox_maps_flutter 2.10.0 [flutter flutter_plugin_android_lifecycle turf typed_data meta]
- package_info_plus 8.1.3 [ffi flutter flutter_web_plugins http meta path package_info_plus_platform_interface web win32 clock]
- path_provider 2.1.5 [flutter path_provider_android path_provider_foundation path_provider_linux path_provider_platform_interface path_provider_windows]
- permission_handler 11.4.0 [flutter meta permission_handler_android permission_handler_apple permission_handler_html permission_handler_windows permission_handler_platform_interface]
- qr_flutter 4.1.0 [flutter qr]
- rx_shared_preferences 4.0.0 [flutter shared_preferences rx_storage meta]
- rxdart 0.28.0
- sentry_flutter 9.6.0 [flutter flutter_web_plugins sentry package_info_plus meta ffi collection web jni]
- share_plus 11.0.0 [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 2.5.3 [flutter shared_preferences_android shared_preferences_foundation shared_preferences_linux shared_preferences_platform_interface shared_preferences_web shared_preferences_windows]
- single_factor_auth_flutter 7.0.0 [flutter plugin_platform_interface]
- skeletonizer 2.0.1 [flutter]
- socket_io_client 3.1.2 [logging socket_io_common web]
- solana 0.31.2+1 [bip39 borsh_annotation collection convert cryptography decimal ed25519_hd_key freezed_annotation http json_annotation typed_data web_socket_channel]
- syncfusion_flutter_charts 29.2.5 [flutter intl vector_math syncfusion_flutter_core]
- url_launcher 6.3.1 [flutter url_launcher_android url_launcher_ios url_launcher_linux url_launcher_macos url_launcher_platform_interface url_launcher_web url_launcher_windows]
- uuid 4.5.1 [crypto sprintf meta fixnum]

dev dependencies:
- build_runner 2.4.15 [analyzer args async build build_config build_daemon build_resolvers build_runner_core code_builder collection crypto dart_style frontend_server_client glob graphs http http_multi_server io js logging meta mime package_config path pool pub_semver pubspec_parse shelf shelf_web_socket stack_trace stream_transform timing watcher web web_socket_channel yaml]
- flutter_gen_runner 5.10.0 [flutter_gen_core build collection crypto glob path yaml]
- flutter_launcher_icons 0.14.3 [args checked_yaml cli_util image json_annotation path yaml]
- flutter_test 0.0.0 [flutter test_api matcher path fake_async clock stack_trace vector_math leak_tracker_flutter_testing collection meta stream_channel]
- freezed 2.5.8 [analyzer build build_config collection meta source_gen freezed_annotation json_annotation dart_style]
- hive_ce_generator 1.9.1 [build source_gen hive_ce analyzer source_helper glob path yaml yaml_writer json_annotation collection meta]
- json_serializable 6.9.5 [analyzer async build build_config collection dart_style json_annotation meta path pub_semver pubspec_parse source_gen source_helper]
- mockito 5.4.6 [analyzer build code_builder collection dart_style matcher meta path source_gen test_api]
- package_rename_plus 1.0.2 [args html yaml]
- sentry_dart_plugin 3.1.1 [yaml injector ansicolor system_info2 file http crypto convert process properties]
- test 1.26.2 [analyzer async boolean_selector collection coverage http_multi_server io js matcher node_preamble package_config path pool shelf shelf_packages_handler shelf_static shelf_web_socket source_span stack_trace stream_channel test_api test_core typed_data web_socket_channel webkit_inspection_protocol yaml]
- very_good_analysis 7.0.0

dependency overrides:
- device_info_plus 11.5.0 [device_info_plus_platform_interface ffi file flutter flutter_web_plugins meta web win32 win32_registry]
- intl 0.20.2 [clock meta path]

transitive dependencies:
- _fe_analyzer_shared 82.0.0 [meta]
- _flutterfire_internals 1.3.62 [collection firebase_core firebase_core_platform_interface flutter meta]
- analyzer 7.4.5 [_fe_analyzer_shared collection convert crypto glob meta package_config path pub_semver source_span watcher yaml]
- ansicolor 2.0.3
- archive 4.0.7 [crypto path posix]
- args 2.7.0
- async 2.13.0 [collection meta]
- auth0_flutter_platform_interface 1.12.0 [flutter plugin_platform_interface web]
- benchmark 0.3.0 [meta args]
- bip39 1.0.6 [pointycastle hex crypto]
- bluez 0.8.3 [dbus]
- boolean_selector 2.1.2 [source_span string_scanner]
- borsh_annotation 0.3.2
- build 2.4.2 [analyzer async convert crypto glob logging meta package_config path]
- build_config 1.1.2 [checked_yaml json_annotation path pubspec_parse yaml]
- build_daemon 4.0.4 [built_collection built_value crypto http_multi_server logging path pool shelf shelf_web_socket stream_transform watcher web_socket_channel]
- build_resolvers 2.4.4 [analyzer async build collection convert crypto graphs logging package_config path pool pub_semver stream_transform yaml]
- build_runner_core 8.0.0 [async build build_config build_resolvers collection convert crypto glob graphs json_annotation logging meta package_config path pool timing watcher yaml]
- built_collection 5.1.1
- built_value 8.9.5 [built_collection collection fixnum meta]
- cached_network_image_platform_interface 4.1.1 [flutter flutter_cache_manager]
- cached_network_image_web 1.3.1 [cached_network_image_platform_interface flutter flutter_cache_manager web]
- characters 1.4.0
- checked_yaml 2.0.3 [json_annotation source_span yaml]
- cli_config 0.2.0 [args yaml]
- cli_util 0.4.2 [meta path]
- clock 1.1.2
- code_builder 4.10.1 [built_collection built_value collection matcher meta]
- color 3.0.0
- convert 3.1.2 [typed_data]
- coverage 1.13.1 [args cli_config glob logging meta package_config path source_maps stack_trace vm_service]
- cross_file 0.3.4+2 [meta web]
- crypto 3.0.6 [typed_data]
- cryptography 2.7.0 [collection crypto ffi js meta typed_data]
- csslib 1.0.2 [source_span]
- dart_either 1.0.0 [meta built_collection]
- dart_opendroneid 0.6.2 [collection]
- dart_sort_queue 0.0.2+3 [collection]
- dart_style 3.1.0 [analyzer args collection package_config path pub_semver source_span yaml]
- dartx 1.2.0 [characters collection crypto meta path time]
- dbus 0.7.11 [args ffi meta xml]
- decimal 3.2.1 [intl rational]
- device_info_plus_platform_interface 7.0.3 [flutter meta plugin_platform_interface]
- diff_match_patch 0.4.1
- dio_web_adapter 2.1.1 [dio http_parser meta web]
- disposebag 1.5.1 [meta collection]
- ed25519_hd_key 2.3.0 [crypto pinenacl]
- fake_async 1.3.3 [clock collection]
- ffi 2.1.4
- file 7.0.1 [meta path]
- firebase_analytics_platform_interface 5.0.2 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface]
- firebase_analytics_web 0.6.0+2 [_flutterfire_internals firebase_analytics_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins]
- firebase_auth_platform_interface 8.1.2 [_flutterfire_internals collection firebase_core flutter http meta plugin_platform_interface]
- firebase_auth_web 6.0.3 [firebase_auth_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins http_parser meta web]
- firebase_core_platform_interface 6.0.1 [collection flutter flutter_test meta plugin_platform_interface]
- firebase_core_web 3.1.1 [firebase_core_platform_interface flutter flutter_web_plugins meta web]
- firebase_crashlytics_platform_interface 3.8.13 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface]
- fixnum 1.1.1
- flutter_background_service_android 6.3.1 [flutter flutter_background_service_platform_interface]
- flutter_background_service_ios 5.0.3 [flutter flutter_background_service_platform_interface]
- flutter_background_service_platform_interface 5.1.2 [flutter platform plugin_platform_interface]
- flutter_blue_plus_android 4.0.5 [flutter flutter_blue_plus_platform_interface]
- flutter_blue_plus_darwin 4.0.1 [flutter flutter_blue_plus_platform_interface]
- flutter_blue_plus_linux 3.0.2 [bluez flutter flutter_blue_plus_platform_interface rxdart]
- flutter_blue_plus_platform_interface 4.0.2 [flutter]
- flutter_blue_plus_web 3.0.1 [flutter flutter_blue_plus_platform_interface flutter_web_plugins web]
- flutter_cache_manager 3.4.1 [clock collection file flutter http path path_provider rxdart sqflite uuid]
- flutter_gen_core 5.10.0 [meta path yaml mime xml dartx color collection json_annotation glob dart_style archive args pub_semver vector_graphics_compiler image_size_getter]
- flutter_plugin_android_lifecycle 2.0.28 [flutter]
- flutter_secure_storage_linux 1.2.3 [flutter flutter_secure_storage_platform_interface]
- flutter_secure_storage_macos 3.1.3 [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]
- flutter_web_plugins 0.0.0 [flutter]
- frontend_server_client 4.0.0 [async path]
- geolocator_android 5.0.1+1 [flutter geolocator_platform_interface meta uuid]
- geolocator_apple 2.3.13 [flutter geolocator_platform_interface]
- geolocator_platform_interface 4.2.6 [flutter plugin_platform_interface vector_math meta]
- geolocator_web 4.1.3 [flutter flutter_web_plugins geolocator_platform_interface web]
- geolocator_windows 0.2.5 [flutter geolocator_platform_interface]
- geotypes 0.0.2 [json_annotation]
- glob 2.1.3 [async collection file path string_scanner]
- globbing 1.0.0 [path]
- google_identity_services_web 0.3.3+1 [meta web]
- google_sign_in_android 7.0.5 [flutter google_sign_in_platform_interface]
- google_sign_in_ios 6.1.0 [flutter google_sign_in_platform_interface]
- google_sign_in_platform_interface 3.1.0 [flutter plugin_platform_interface]
- google_sign_in_web 1.0.0 [flutter flutter_web_plugins google_identity_services_web google_sign_in_platform_interface http web]
- graphs 2.3.2 [collection]
- hashcodes 2.0.0
- hex 0.2.0
- html 0.15.6 [csslib source_span]
- http 1.4.0 [async http_parser meta web]
- http_multi_server 3.2.2 [async]
- http_parser 4.1.2 [collection source_span string_scanner typed_data]
- image 4.5.2 [archive meta xml]
- image_size_getter 2.4.0 [collection hashcodes meta]
- injector 3.0.0
- io 1.0.5 [meta path string_scanner]
- isolate_channel 0.2.2+1
- jni 0.14.2 [args ffi meta package_config path plugin_platform_interface]
- js 0.6.7 [meta]
- leak_tracker 11.0.1 [clock collection meta path vm_service]
- leak_tracker_flutter_testing 3.0.10 [flutter leak_tracker leak_tracker_testing matcher meta]
- leak_tracker_testing 3.0.2 [leak_tracker matcher meta]
- logging 1.3.0
- matcher 0.12.17 [async meta stack_trace term_glyph test_api]
- material_color_utilities 0.11.1 [collection]
- meta 1.16.0
- mime 2.0.0
- mocktail 1.0.4 [collection matcher test_api]
- nested 1.0.0 [flutter]
- node_preamble 2.0.2
- octo_image 2.1.0 [flutter]
- package_config 2.2.0 [path]
- package_info_plus_platform_interface 3.2.0 [flutter meta plugin_platform_interface]
- path 1.9.1
- path_parsing 1.1.0 [meta vector_math]
- path_provider_android 2.2.17 [flutter path_provider_platform_interface]
- path_provider_foundation 2.4.1 [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 2.3.0 [ffi flutter path path_provider_platform_interface]
- permission_handler_android 12.1.0 [flutter permission_handler_platform_interface]
- permission_handler_apple 9.4.7 [flutter permission_handler_platform_interface]
- permission_handler_html 0.1.3+5 [flutter flutter_web_plugins permission_handler_platform_interface web]
- permission_handler_platform_interface 4.3.0 [flutter meta plugin_platform_interface]
- permission_handler_windows 0.2.1 [flutter permission_handler_platform_interface]
- petitparser 6.1.0 [meta collection]
- pinenacl 0.6.0
- platform 3.1.6
- plugin_platform_interface 2.1.8 [meta]
- pointycastle 3.9.1 [collection convert js]
- pool 1.5.1 [async stack_trace]
- posix 6.0.2 [ffi meta path]
- process 5.0.5 [file path platform]
- properties 2.1.1 [meta]
- provider 6.1.5 [collection flutter nested]
- pub_semver 2.2.0 [collection]
- pubspec_parse 1.5.0 [checked_yaml collection json_annotation pub_semver yaml]
- qr 3.0.2 [meta]
- rational 2.2.3
- rbush 1.1.1
- rx_storage 3.0.0 [rxdart_ext disposebag meta stack_trace]
- rxdart_ext 0.3.0 [rxdart meta stack_trace path dart_either]
- sentry 9.6.0 [http meta stack_trace uuid collection web]
- share_plus_platform_interface 6.0.0 [cross_file flutter meta mime plugin_platform_interface path_provider uuid]
- shared_preferences_android 2.4.10 [flutter shared_preferences_platform_interface]
- shared_preferences_foundation 2.5.4 [flutter shared_preferences_platform_interface]
- shared_preferences_linux 2.4.1 [file flutter path path_provider_linux path_provider_platform_interface shared_preferences_platform_interface]
- shared_preferences_platform_interface 2.4.1 [flutter plugin_platform_interface]
- shared_preferences_web 2.4.3 [flutter flutter_web_plugins shared_preferences_platform_interface web]
- shared_preferences_windows 2.4.1 [file flutter path path_provider_platform_interface path_provider_windows shared_preferences_platform_interface]
- shelf 1.4.2 [async collection http_parser path stack_trace stream_channel]
- shelf_packages_handler 3.0.2 [path shelf shelf_static]
- shelf_static 1.1.3 [convert http_parser mime path shelf]
- shelf_web_socket 3.0.0 [shelf stream_channel web_socket_channel]
- sky_engine 0.0.0
- socket_io_common 3.1.1 [logging]
- source_gen 2.0.0 [analyzer async build dart_style glob path pub_semver source_span yaml]
- source_helper 1.3.5 [analyzer collection source_gen]
- source_map_stack_trace 2.1.2 [path source_maps stack_trace]
- source_maps 0.10.13 [source_span]
- source_span 1.10.1 [collection path term_glyph]
- sprintf 7.0.0
- sqflite 2.4.2 [flutter sqflite_android sqflite_darwin sqflite_platform_interface sqflite_common path]
- sqflite_android 2.4.1 [flutter sqflite_common path sqflite_platform_interface]
- sqflite_common 2.5.5 [synchronized path meta]
- sqflite_darwin 2.4.2 [flutter sqflite_platform_interface meta sqflite_common path]
- sqflite_platform_interface 2.4.0 [flutter platform sqflite_common plugin_platform_interface meta]
- stack_trace 1.12.1 [path]
- stream_channel 2.1.4 [async]
- stream_transform 2.1.1
- string_scanner 1.4.1 [source_span]
- sweepline_intersections 0.0.4 [turf dart_sort_queue collection benchmark]
- syncfusion_flutter_core 29.2.5 [vector_math flutter]
- synchronized 3.3.1
- system_info2 4.0.0 [globbing path]
- term_glyph 1.2.2
- test_api 0.7.6 [async boolean_selector collection meta source_span stack_trace stream_channel string_scanner term_glyph]
- test_core 0.6.11 [analyzer args async boolean_selector collection coverage frontend_server_client glob io meta package_config path pool source_map_stack_trace source_maps source_span stack_trace stream_channel test_api vm_service yaml]
- time 2.1.5 [clock]
- timing 1.0.2 [json_annotation]
- turf 0.0.10 [geotypes turf_equality turf_pip rbush sweepline_intersections]
- turf_equality 0.1.0 [geotypes]
- turf_pip 0.0.2 [turf]
- typed_data 1.4.0 [collection]
- universal_io 2.2.2 [collection meta typed_data]
- url_launcher_android 6.3.16 [flutter url_launcher_platform_interface]
- url_launcher_ios 6.3.3 [flutter url_launcher_platform_interface]
- url_launcher_linux 3.2.1 [flutter url_launcher_platform_interface]
- url_launcher_macos 3.2.2 [flutter url_launcher_platform_interface]
- url_launcher_platform_interface 2.3.2 [flutter plugin_platform_interface]
- url_launcher_web 2.4.1 [flutter flutter_web_plugins url_launcher_platform_interface web]
- url_launcher_windows 3.1.4 [flutter url_launcher_platform_interface]
- vector_graphics 1.1.18 [flutter http vector_graphics_codec]
- vector_graphics_codec 1.1.13
- vector_graphics_compiler 1.1.17 [args meta path path_parsing vector_graphics_codec xml]
- vector_math 2.2.0
- vm_service 15.0.0
- watcher 1.1.1 [async path]
- web 1.1.1
- web_socket 1.0.1 [web]
- web_socket_channel 3.0.3 [async crypto stream_channel web web_socket]
- webkit_inspection_protocol 1.2.1 [logging]
- win32 5.13.0 [ffi]
- win32_registry 2.1.0 [ffi meta win32]
- xdg_directories 1.1.0 [meta path]
- xml 6.5.0 [collection meta petitparser]
- yaml 3.1.3 [collection source_span string_scanner]
- yaml_writer 2.1.0

Additional context and comments

No response

[MichaelVerdon]

Hi there, i have been able to reproduce this. The screen you want only shows when you newly add the apple account to your simulator or device. I am suspecting this could be a native issue but will investigate before I can conclude that.

[Daeon97]

Hello @MichaelVerdon thanks for the reply. So right now I have resort to combining using sign_in_with_apple with Firebase Auth as this resolved my current issue. Using Firebase Auth alone to implement Apple sign in is what leads to this problem so this is an issue with the Firebase Auth package/plugin itself

[Daeon97]

@MichaelVerdon also just want to point this out. I also realized that Firebase Auth always returns a null for user email too regardless of whether Apple Sign In is happening the first time on the app or not

Again, using sign_in_with_apple with Firebase Auth also resolved this issue

I should probably create a new issue for this but at least anyone that stumbles upon this issue will have some idea of this other issue

[MichaelVerdon]

Hi there, using sign_in_with_apple is recommended in our docs anyways https://firebase.flutter.dev/docs/auth/social#apple
The reason I say it is a native issue is because FlutterFire wraps around the native SDKs (Android/iOS/Web/Windows) e.t.c and we do not contain logic that handles that flow (we just wrap around it) there which leads me to believe it could be an ios-sdk issue.

[Daeon97]

@MichaelVerdon yes it is shown in the docs but the docs make it seem like sign_in_with_apple can be used as an alternate implementation path, i.e. Apple Sign In with Firebase Auth can be done with or without sign_in_with_apple depending on choice, when in fact, with the current state of sign_in_with_apple on iOS in Flutter, this should not be a choice. The docs should make it clear that integrating Apple Sign In with Firebase Auth requires sign_in_with_apple. It should be boldly highlighted

The Google Sign In docs boldly highlights this:

On native platforms, a 3rd party library is required to trigger the authentication flow.
Install the official google_sign_in plugin.

The Apple Sign In doc does not. Instead it says this:

Apple sign-in on iOS+ platforms can also be achieved with the following method:

Also, this part of the doc should be eliminated:

Instantiating AppleAuthProvider and calling signInWithPopup on the AppleAuthProvider instance is what specifically leads to this problem. The doc should instead reflect that sign_in_with_apple should be used for initial Auth flow then the credential from that flow should be used to create a new Firebase credential

The Apple sign In section should be enhanced and things should made as obvious as in the Google sign in implementation instructions