Installing firebase_auth causes error

Including firebase_auth creates errors and I cannot even start the app. 

Steps to reproduce: 

1. Create a flutter app
2. Add `firebase_auth: "^0.5.9"` to the pubspec.yaml file
3. Add the GoogleService-Info.plist downloaded from firebase console to the Runner directory of the app
3. Run `flutter run` command

Here is the outputs of `flutter run`
```
Launching lib/main.dart on iPhone X in debug mode...
Skipping compilation. Fingerprint match.
Running Xcode clean...                                       2.8s
Starting Xcode build...
Xcode build done.                                            4.6s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **

Xcode's output:
↳
    === BUILD TARGET firebase_auth OF PROJECT Pods WITH CONFIGURATION Debug ===
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:5:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/Flutter.h:37:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterAppDelegate.h:11:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterPlugin.h:80:42: warning: 'UIUserNotificationSettings' is only available on iOS 8.0 or newer [-Wunguarded-availability]
        didRegisterUserNotificationSettings:(UIUserNotificationSettings*)notificationSettings;
                                             ^
    In module 'UIKit' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Target Support Files/firebase_auth/firebase_auth-prefix.pch:2:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIUserNotificationSettings.h:43:12: note: 'UIUserNotificationSettings' has been explicitly marked partial here
    @interface UIUserNotificationSettings : NSObject
               ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:5:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/Flutter.h:37:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterAppDelegate.h:11:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterPlugin.h:79:1: note: annotate 'application:didRegisterUserNotificationSettings:' with an availability attribute to silence this warning
    - (void)application:(UIApplication*)application
    ^
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterPlugin.h:95:44: warning: 'UIBackgroundFetchResult' is only available on iOS 7.0 or newer [-Wunguarded-availability]
              fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler;
                                               ^
    In module 'UIKit' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Target Support Files/firebase_auth/firebase_auth-prefix.pch:2:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIApplication.h:76:29: note: 'UIBackgroundFetchResult' has been explicitly marked partial here
    typedef NS_ENUM(NSUInteger, UIBackgroundFetchResult) {
                                ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:5:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/Flutter.h:37:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterAppDelegate.h:11:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterPlugin.h:93:1: note: annotate 'application:didReceiveRemoteNotification:fetchCompletionHandler:' with an availability attribute to silence this warning
    - (BOOL)application:(UIApplication*)application
    ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:69:53: error: incompatible block pointer types sending 'void (^)(FIRUser *__strong, NSError *__strong)' to parameter of type 'FIRAuthDataResultCallback _Nullable' (aka 'void (^)(FIRAuthDataResult * _Nullable __strong, NSError * _Nullable __strong)')
        [[FIRAuth auth] signInAnonymouslyWithCompletion:^(FIRUser *user, NSError *error) {
                                                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:21:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRAuth.h:539:77: note: passing argument to parameter 'completion' here
    - (void)signInAnonymouslyWithCompletion:(nullable FIRAuthDataResultCallback)completion;
                                                                                ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:77:21: warning: 'signInWithCredential:completion:' is deprecated: Please use signInAndRetrieveDataWithCredential:completion: for Objective-C or signInAndRetrieveData(with:completion:) for Swift instead. [-Wdeprecated-declarations]
        [[FIRAuth auth] signInWithCredential:credential
                        ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:21:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRAuth.h:476:73: note: 'signInWithCredential:completion:' has been explicitly marked deprecated here
                      completion:(nullable FIRAuthResultCallback)completion DEPRECATED_MSG_ATTRIBUTE(
                                                                            ^
    In module 'Darwin' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterViewController.h:9:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/usr/include/AvailabilityMacros.h:178:64: note: expanded from macro 'DEPRECATED_MSG_ATTRIBUTE'
                #define DEPRECATED_MSG_ATTRIBUTE(s) __attribute__((deprecated(s)))
                                                                   ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:84:21: warning: 'signInWithCredential:completion:' is deprecated: Please use signInAndRetrieveDataWithCredential:completion: for Objective-C or signInAndRetrieveData(with:completion:) for Swift instead. [-Wdeprecated-declarations]
        [[FIRAuth auth] signInWithCredential:credential
                        ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:21:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRAuth.h:476:73: note: 'signInWithCredential:completion:' has been explicitly marked deprecated here
                      completion:(nullable FIRAuthResultCallback)completion DEPRECATED_MSG_ATTRIBUTE(
                                                                            ^
    In module 'Darwin' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterViewController.h:9:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/usr/include/AvailabilityMacros.h:178:64: note: expanded from macro 'DEPRECATED_MSG_ATTRIBUTE'
                #define DEPRECATED_MSG_ATTRIBUTE(s) __attribute__((deprecated(s)))
                                                                   ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:93:21: warning: 'signInWithCredential:completion:' is deprecated: Please use signInAndRetrieveDataWithCredential:completion: for Objective-C or signInAndRetrieveData(with:completion:) for Swift instead. [-Wdeprecated-declarations]
        [[FIRAuth auth] signInWithCredential:credential
                        ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:21:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRAuth.h:476:73: note: 'signInWithCredential:completion:' has been explicitly marked deprecated here
                      completion:(nullable FIRAuthResultCallback)completion DEPRECATED_MSG_ATTRIBUTE(
                                                                            ^
    In module 'Darwin' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterViewController.h:9:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/usr/include/AvailabilityMacros.h:178:64: note: expanded from macro 'DEPRECATED_MSG_ATTRIBUTE'
                #define DEPRECATED_MSG_ATTRIBUTE(s) __attribute__((deprecated(s)))
                                                                   ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:102:41: error: incompatible block pointer types sending 'void (^)(FIRUser *__strong, NSError *__strong)' to parameter of type 'FIRAuthDataResultCallback _Nullable' (aka 'void (^)(FIRAuthDataResult * _Nullable __strong, NSError * _Nullable __strong)')
                                 completion:^(FIRUser *user, NSError *error) {
                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:21:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRAuth.h:643:65: note: passing argument to parameter 'completion' here
                     completion:(nullable FIRAuthDataResultCallback)completion;
                                                                    ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:130:37: error: incompatible block pointer types sending 'void (^)(FIRUser *__strong, NSError *__strong)' to parameter of type 'FIRAuthDataResultCallback _Nullable' (aka 'void (^)(FIRAuthDataResult * _Nullable __strong, NSError * _Nullable __strong)')
                             completion:^(FIRUser *user, NSError *error) {
                                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:21:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRAuth.h:379:61: note: passing argument to parameter 'completion' here
                 completion:(nullable FIRAuthDataResultCallback)completion;
                                                                ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:153:33: warning: 'linkWithCredential:completion:' is deprecated: Please use linkAndRetrieveDataWithCredential:completion: for Objective-C or linkAndRetrieveData(WithCredential:completion:) for Swift instead. [-Wdeprecated-declarations]
        [[FIRAuth auth].currentUser linkWithCredential:credential
                                    ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:33:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRUser.h:334:71: note: 'linkWithCredential:completion:' has been explicitly marked deprecated here
                    completion:(nullable FIRAuthResultCallback)completion DEPRECATED_MSG_ATTRIBUTE(
                                                                          ^
    In module 'Darwin' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterViewController.h:9:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/usr/include/AvailabilityMacros.h:178:64: note: expanded from macro 'DEPRECATED_MSG_ATTRIBUTE'
                #define DEPRECATED_MSG_ATTRIBUTE(s) __attribute__((deprecated(s)))
                                                                   ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:162:33: warning: 'linkWithCredential:completion:' is deprecated: Please use linkAndRetrieveDataWithCredential:completion: for Objective-C or linkAndRetrieveData(WithCredential:completion:) for Swift instead. [-Wdeprecated-declarations]
        [[FIRAuth auth].currentUser linkWithCredential:credential
                                    ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:33:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRUser.h:334:71: note: 'linkWithCredential:completion:' has been explicitly marked deprecated here
                    completion:(nullable FIRAuthResultCallback)completion DEPRECATED_MSG_ATTRIBUTE(
                                                                          ^
    In module 'Darwin' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterViewController.h:9:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/usr/include/AvailabilityMacros.h:178:64: note: expanded from macro 'DEPRECATED_MSG_ATTRIBUTE'
                #define DEPRECATED_MSG_ATTRIBUTE(s) __attribute__((deprecated(s)))
                                                                   ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:169:33: warning: 'linkWithCredential:completion:' is deprecated: Please use linkAndRetrieveDataWithCredential:completion: for Objective-C or linkAndRetrieveData(WithCredential:completion:) for Swift instead. [-Wdeprecated-declarations]
        [[FIRAuth auth].currentUser linkWithCredential:credential
                                    ^
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:33:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRUser.h:334:71: note: 'linkWithCredential:completion:' has been explicitly marked deprecated here
                    completion:(nullable FIRAuthResultCallback)completion DEPRECATED_MSG_ATTRIBUTE(
                                                                          ^
    In module 'Darwin' imported from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Public/Flutter/Flutter/FlutterViewController.h:9:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.3.sdk/usr/include/AvailabilityMacros.h:178:64: note: expanded from macro 'DEPRECATED_MSG_ATTRIBUTE'
                #define DEPRECATED_MSG_ATTRIBUTE(s) __attribute__((deprecated(s)))
                                                                   ^
    /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:187:43: error: incompatible block pointer types sending 'void (^)(FIRUser *__strong, NSError *__strong)' to parameter of type 'FIRAuthDataResultCallback _Nullable' (aka 'void (^)(FIRAuthDataResult * _Nullable __strong, NSError * _Nullable __strong)')
                                   completion:^(FIRUser *user, NSError *error) {
                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.m:5:
    In file included from /Users/mycomputer/development/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.9/ios/Classes/FirebaseAuthPlugin.h:7:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/Firebase/Firebase.h:18:
    In file included from /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FirebaseAuth.h:21:
    /Users/mycomputer/Dropbox/flutter/choice_flutter/ios/Pods/Headers/Private/FirebaseAuth/FIRAuth.h:586:67: note: passing argument to parameter 'completion' here
                       completion:(nullable FIRAuthDataResultCallback)completion;
                                                                      ^
    8 warnings and 4 errors generated.
Could not build the application for the simulator.
Error launching application on iPhone X.
```

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Installing firebase_auth causes error #17457

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Installing firebase_auth causes error #17457

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