[firebase_auth]: Can't use verifyPhoneNumber before updating the phone number?

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 aim to validate the new user’s phone number using FirebaseAuth.instance.verifyPhoneNumber before updating the phone number. However, I encountered the issue below using the FirebaseAuth.instance.verifyPhoneNumber method while the user authenticated has already linked a phone number.

Reproducing the issue

Stay authenticated with a user linked with a phone number;
Use the FirebaseAuth.instance.verifyPhoneNumber method with a new phone number.

Firebase Core version

2.29.0

Flutter Version

3.19.5

Relevant Log Output

[firebase_auth/provider-already-linked] [ERROR_PROVIDER_ALREADY_LINKED] - User can only be linked to one identity for the given provider

Flutter dependencies

Expand Flutter dependencies snippet

```yaml - amplitude_flutter 3.16.2 [flutter flutter_web_plugins js] - async 2.11.0 [collection meta] - auto_size_text_field 2.2.3 [flutter] - birthday 1.0.0 [clock equatable meta] - cloud_firestore 4.17.2 [cloud_firestore_platform_interface cloud_firestore_web collection firebase_core firebase_core_platform_interface flutter meta] - collection 1.18.0 - connectivity_plus 6.0.3 [flutter flutter_web_plugins connectivity_plus_platform_interface web meta nm collection] - contacts_service 0.6.3 [flutter collection quiver] - cpf_cnpj_validator 2.0.0 [flutter flutter_test] - dart_ipify 1.1.1 [http] - dartz 0.10.1 - decimal 2.3.3 [rational] - device_details 0.0.1 [dart_ipify device_info_plus equatable flutter] - device_info_plus 10.1.0 [device_info_plus_platform_interface ffi file flutter flutter_web_plugins meta web win32 win32_registry] - diacritic 0.1.5 - dimensiones 0.0.1 [flutter] - dio 5.4.3+1 [async http_parser meta path] - dotted_border 2.1.0 [flutter path_drawing] - equatable 2.0.5 [collection meta] - expand_tap_area 1.1.1 [flutter] - figma_squircle 0.5.3 [vector_math flutter] - file_picker 8.0.3 [flutter flutter_web_plugins flutter_plugin_android_lifecycle plugin_platform_interface ffi path win32 cross_file web] - firebase 9.0.3 [http http_parser js] - firebase_analytics 10.10.4 [firebase_analytics_platform_interface firebase_analytics_web firebase_core firebase_core_platform_interface flutter] - firebase_auth 4.19.4 [firebase_auth_platform_interface firebase_auth_web firebase_core firebase_core_platform_interface flutter meta] - firebase_core 2.30.1 [firebase_core_platform_interface firebase_core_web flutter meta] - firebase_messaging 14.9.1 [firebase_core firebase_core_platform_interface firebase_messaging_platform_interface firebase_messaging_web flutter meta] - firebase_performance 0.9.4+4 [firebase_core firebase_core_platform_interface firebase_performance_platform_interface firebase_performance_web flutter] - firebase_remote_config 4.4.4 [firebase_core firebase_core_platform_interface firebase_remote_config_platform_interface firebase_remote_config_web flutter] - firebase_storage 11.7.4 [firebase_core firebase_core_platform_interface firebase_storage_platform_interface firebase_storage_web flutter] - fl_chart 0.67.0 [equatable flutter] - flap 0.0.2 [flutter meta theme] - flutter 0.0.0 [characters collection material_color_utilities meta vector_math sky_engine] - flutter_keyboard_visibility 6.0.0 [meta flutter_keyboard_visibility_platform_interface flutter_keyboard_visibility_linux flutter_keyboard_visibility_macos flutter_keyboard_visibility_web flutter_keyboard_visibility_windows flutter] - flutter_local_notifications 17.1.2 [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_pdfview 1.3.2 [flutter] - flutter_riverpod 2.5.1 [collection flutter meta riverpod state_notifier] - flutter_svg 2.0.10+1 [flutter http vector_graphics vector_graphics_codec vector_graphics_compiler] - formz 0.7.0 [meta] - gap 3.0.1 [flutter] - google_maps_webservice 0.0.20-nullsafety.5 [http meta json_annotation] - http 0.13.6 [async http_parser meta] - intl 0.18.1 [clock meta path] - kiyibodi 0.0.2 [flutter theme] - launch_review 3.0.1 [flutter] - local_auth 2.2.0 [flutter local_auth_android local_auth_darwin local_auth_platform_interface local_auth_windows] - logbook 0.0.1 [flutter logger meta sentry_flutter] - lottie 3.1.0 [archive flutter http path vector_math] - mask_text_input_formatter 2.9.0 [flutter] - meta 1.11.0 - money2 4.0.0 [decimal fixed intl meta] - onfido_sdk 6.0.0 [flutter plugin_platform_interface] - open_mail_app 0.4.5 [platform url_launcher flutter] - open_settings 2.0.2 [flutter] - package_info_plus 7.0.0 [ffi flutter flutter_web_plugins http meta path package_info_plus_platform_interface web win32 clock] - page_view_indicators 2.0.0 [flutter] - 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] - platform_maps_flutter 1.0.2 [flutter google_maps_flutter google_maps_flutter_platform_interface apple_maps_flutter] - provider 6.1.2 [collection flutter nested] - retry 3.1.2 - riverpod 2.5.1 [collection meta stack_trace state_notifier] - riverpod_annotation 2.3.5 [meta riverpod] - riverpod_generator 2.4.0 [analyzer build build_config collection crypto meta path riverpod_analyzer_utils riverpod_annotation source_gen] - rxdart 0.27.7 - sanationes 0.0.3 [equatable] - secrete 0.0.1 [flutter plugin_platform_interface] - 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] - string_capitalize 0.0.10 - theme 0.0.1 [equatable flutter gap] - uni_links 0.5.1 [flutter uni_links_platform_interface uni_links_web] - url_launcher 6.2.6 [flutter url_launcher_android url_launcher_ios url_launcher_linux url_launcher_macos url_launcher_platform_interface url_launcher_web url_launcher_windows] - webview_flutter 4.7.0 [flutter webview_flutter_android webview_flutter_platform_interface webview_flutter_wkwebview] dev dependencies: - alchemist 0.7.0 [equatable flutter flutter_test meta path universal_io] - build_runner 2.4.9 [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_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_socket_channel yaml] - dart_code_metrics 5.7.6 [analyzer analyzer_plugin ansicolor args collection crypto dart_code_metrics_presets file glob html http meta path platform pub_updater source_span uuid xml yaml] - fake_cloud_firestore 2.5.1 [flutter cloud_firestore cloud_firestore_platform_interface collection plugin_platform_interface quiver rxdart mock_exceptions fake_firebase_security_rules rx equatable clock] - faker 2.1.0 [crypto] - flutter_gen_runner 5.4.0 [flutter_gen_core build collection crypto glob path] - flutter_lints 3.0.2 [lints] - 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] - glados 1.1.7 [characters meta test] - mocktail 1.0.3 [collection matcher test_api] - mocktailx 0.0.7 [mocktail] dependency overrides: - http 0.13.6 [async http_parser meta] transitive dependencies: - _fe_analyzer_shared 61.0.0 [meta] - _flutterfire_internals 1.3.32 [collection firebase_core firebase_core_platform_interface flutter meta] - analyzer 5.13.0 [_fe_analyzer_shared collection convert crypto glob meta package_config path pub_semver source_span watcher yaml] - analyzer_plugin 0.11.2 [analyzer collection dart_style pub_semver yaml] - ansicolor 2.0.2 - antlr4 4.13.1 [logging collection] - apple_maps_flutter 1.3.0 [flutter] - archive 3.5.1 [crypto path] - args 2.5.0 - boolean_selector 2.1.1 [source_span string_scanner] - build 2.4.1 [analyzer async convert crypto glob logging meta package_config path] - build_config 1.1.1 [checked_yaml json_annotation path pubspec_parse yaml] - build_daemon 4.0.1 [built_collection built_value crypto http_multi_server logging path pool shelf shelf_web_socket stream_transform watcher web_socket_channel] - build_resolvers 2.4.2 [analyzer async build collection convert crypto graphs logging package_config path pool pub_semver stream_transform yaml] - build_runner_core 7.3.0 [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 8.9.2 [built_collection collection fixnum meta] - cel 0.5.3 [antlr4 collection equatable] - characters 1.3.0 - checked_yaml 2.0.3 [json_annotation source_span yaml] - clock 1.1.1 - cloud_firestore_platform_interface 6.2.2 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - cloud_firestore_web 3.12.2 [_flutterfire_internals cloud_firestore_platform_interface collection firebase_core firebase_core_web flutter flutter_web_plugins] - code_builder 4.10.0 [built_collection built_value collection matcher meta] - color 3.0.0 - connectivity_plus_platform_interface 2.0.0 [flutter meta plugin_platform_interface] - convert 3.1.1 [typed_data] - coverage 1.8.0 [args logging package_config path source_maps stack_trace vm_service] - cross_file 0.3.4+1 [meta web] - crypto 3.0.3 [typed_data] - csslib 1.0.0 [source_span] - custom_lint_core 0.6.3 [analyzer analyzer_plugin collection glob matcher meta package_config path pubspec_parse source_span yaml] - dart_code_metrics_presets 1.8.0 - dart_style 2.3.2 [analyzer args path pub_semver source_span] - dartx 1.2.0 [characters collection crypto meta path time] - dbus 0.7.10 [args ffi meta xml] - device_info_plus_platform_interface 7.0.0 [flutter meta plugin_platform_interface] - fake_async 1.3.1 [clock collection] - fake_firebase_security_rules 0.5.3 [antlr4 cel equatable logger tuple] - ffi 2.1.2 - file 6.1.4 [meta path] - firebase_analytics_platform_interface 3.10.5 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_analytics_web 0.5.7+4 [_flutterfire_internals firebase_analytics_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins] - firebase_auth_platform_interface 7.2.5 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_auth_web 5.11.4 [firebase_auth_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins http_parser meta web] - firebase_core_platform_interface 5.0.0 [collection flutter flutter_test meta plugin_platform_interface] - firebase_core_web 2.16.0 [firebase_core_platform_interface flutter flutter_web_plugins meta web] - firebase_messaging_platform_interface 4.5.34 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_messaging_web 3.8.4 [_flutterfire_internals firebase_core firebase_core_web firebase_messaging_platform_interface flutter flutter_web_plugins meta web] - firebase_performance_platform_interface 0.1.4+32 [_flutterfire_internals firebase_core flutter plugin_platform_interface] - firebase_performance_web 0.1.6+4 [_flutterfire_internals firebase_core firebase_core_web firebase_performance_platform_interface flutter flutter_web_plugins] - firebase_remote_config_platform_interface 1.4.32 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_remote_config_web 1.6.4 [firebase_core firebase_core_web firebase_remote_config_platform_interface flutter flutter_web_plugins] - firebase_storage_platform_interface 5.1.19 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_storage_web 3.9.4 [_flutterfire_internals async firebase_core firebase_core_web firebase_storage_platform_interface flutter flutter_web_plugins http meta web] - fixed 4.0.1 [decimal intl meta] - fixnum 1.1.0 - flutter_gen_core 5.4.0 [path yaml mime xml dartx color collection json_annotation glob dart_style args pub_semver] - flutter_keyboard_visibility_linux 1.0.0 [flutter_keyboard_visibility_platform_interface flutter] - flutter_keyboard_visibility_macos 1.0.0 [flutter_keyboard_visibility_platform_interface flutter] - flutter_keyboard_visibility_platform_interface 2.0.0 [flutter meta plugin_platform_interface] - flutter_keyboard_visibility_web 2.0.0 [flutter_keyboard_visibility_platform_interface flutter_web_plugins flutter] - flutter_keyboard_visibility_windows 1.0.0 [flutter_keyboard_visibility_platform_interface flutter] - flutter_local_notifications_linux 4.0.0+1 [dbus ffi flutter flutter_local_notifications_platform_interface path xdg_directories] - flutter_local_notifications_platform_interface 7.1.0 [flutter plugin_platform_interface] - flutter_plugin_android_lifecycle 2.0.19 [flutter] - flutter_web_plugins 0.0.0 [flutter characters collection material_color_utilities meta vector_math] - freezed_annotation 2.4.1 [collection json_annotation meta] - frontend_server_client 3.2.0 [async path] - glob 2.1.2 [async collection file path string_scanner] - google_maps 7.1.0 [js js_wrapping meta web] - google_maps_flutter 2.6.1 [flutter google_maps_flutter_android google_maps_flutter_ios google_maps_flutter_platform_interface google_maps_flutter_web] - google_maps_flutter_android 2.8.0 [flutter flutter_plugin_android_lifecycle google_maps_flutter_platform_interface stream_transform] - google_maps_flutter_ios 2.6.0 [flutter google_maps_flutter_platform_interface stream_transform] - google_maps_flutter_platform_interface 2.6.0 [collection flutter plugin_platform_interface stream_transform] - google_maps_flutter_web 0.5.7 [collection flutter flutter_web_plugins google_maps google_maps_flutter_platform_interface sanitize_html stream_transform web] - graphs 2.3.1 [collection] - html 0.15.4 [csslib source_span] - http_multi_server 3.2.1 [async] - http_parser 4.0.2 [collection source_span string_scanner typed_data] - io 1.0.4 [meta path string_scanner] - js 0.6.7 [meta] - js_wrapping 0.7.4 [js] - json_annotation 4.9.0 [meta] - leak_tracker 10.0.0 [clock collection meta path vm_service] - leak_tracker_flutter_testing 2.0.1 [flutter leak_tracker leak_tracker_testing matcher meta] - leak_tracker_testing 2.0.1 [leak_tracker matcher meta] - lints 3.0.0 - local_auth_android 1.0.38 [flutter flutter_plugin_android_lifecycle intl local_auth_platform_interface] - local_auth_darwin 1.2.2 [flutter intl local_auth_platform_interface] - local_auth_platform_interface 1.0.10 [flutter plugin_platform_interface] - local_auth_windows 1.0.10 [flutter local_auth_platform_interface] - logger 2.2.0 - logging 1.2.0 - matcher 0.12.16+1 [async meta stack_trace term_glyph test_api] - material_color_utilities 0.8.0 [collection] - mime 1.0.5 - mock_exceptions 0.8.2 [matcher] - more 4.2.0 [characters clock collection meta] - nested 1.0.0 [flutter] - nm 0.5.0 [dbus] - node_preamble 2.0.2 - package_config 2.1.0 [path] - package_info_plus_platform_interface 3.0.0 [flutter meta plugin_platform_interface] - path 1.9.0 - path_drawing 1.0.1 [vector_math meta path_parsing flutter] - path_parsing 1.0.1 [vector_math meta] - path_provider_android 2.2.4 [flutter path_provider_platform_interface] - path_provider_foundation 2.3.2 [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 12.0.6 [flutter permission_handler_platform_interface] - permission_handler_apple 9.4.4 [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 3.1.4 - plugin_platform_interface 2.1.8 [meta] - pool 1.5.1 [async stack_trace] - process 4.2.4 [file path platform] - pub_semver 2.1.4 [collection meta] - pub_updater 0.3.1 [http json_annotation process pub_semver] - pubspec_parse 1.2.3 [checked_yaml collection json_annotation pub_semver yaml] - quiver 3.2.1 [matcher] - rational 2.2.2 - riverpod_analyzer_utils 0.5.1 [analyzer collection crypto custom_lint_core freezed_annotation meta path source_span] - rx 0.4.0 [collection matcher meta more] - sanitize_html 2.1.0 [html meta] - sentry 8.1.0 [http meta stack_trace uuid] - sentry_flutter 8.1.0 [flutter flutter_web_plugins sentry package_info_plus meta ffi] - share_plus_platform_interface 4.0.0 [cross_file flutter meta mime plugin_platform_interface path_provider uuid] - shared_preferences_android 2.2.2 [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] - shelf 1.4.1 [async collection http_parser path stack_trace stream_channel] - shelf_packages_handler 3.0.2 [path shelf shelf_static] - shelf_static 1.1.2 [convert http_parser mime path shelf] - shelf_web_socket 1.0.4 [shelf stream_channel web_socket_channel] - sky_engine 0.0.99 - source_gen 1.5.0 [analyzer async build dart_style glob path source_span yaml] - source_map_stack_trace 2.1.1 [path source_maps stack_trace] - source_maps 0.10.12 [source_span] - source_span 1.10.0 [collection path term_glyph] - stack_trace 1.11.1 [path] - state_notifier 1.0.0 [meta] - stream_channel 2.1.2 [async] - stream_transform 2.1.0 - string_scanner 1.2.0 [source_span] - term_glyph 1.2.1 - test 1.24.9 [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] - test_api 0.6.1 [async boolean_selector collection meta source_span stack_trace stream_channel string_scanner term_glyph] - test_core 0.5.9 [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 2.1.4 [clock] - timezone 0.9.3 [path] - timing 1.0.1 [json_annotation] - tuple 2.0.2 - typed_data 1.3.2 [collection] - uni_links_platform_interface 1.0.0 [flutter plugin_platform_interface] - uni_links_web 0.1.0 [flutter flutter_web_plugins uni_links_platform_interface] - universal_io 2.2.2 [collection meta typed_data] - url_launcher_android 6.3.1 [flutter url_launcher_platform_interface] - url_launcher_ios 6.2.5 [flutter url_launcher_platform_interface] - url_launcher_linux 3.1.1 [flutter url_launcher_platform_interface] - url_launcher_macos 3.1.0 [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] - uuid 3.0.7 [crypto] - 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 13.0.0 - watcher 1.1.0 [async path] - web 0.5.1 - web_socket_channel 2.4.5 [async crypto stream_channel web] - webkit_inspection_protocol 1.2.1 [logging] - webview_flutter_android 3.16.1 [flutter webview_flutter_platform_interface] - webview_flutter_platform_interface 2.10.0 [flutter meta plugin_platform_interface] - webview_flutter_wkwebview 3.13.0 [flutter path webview_flutter_platform_interface] - win32 5.5.0 [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

I would like to understand how I could verify the new user’s phone number before updating it.

firebase / flutterfire