해당 오류와 같은 문제가 발생하는데 제가 뭘 빼먹었을까요 ?

아.. 그리고 구글 로그인 후 => 탭 페이지로 이동되지 않고아래와 같은 메시지가 뜨는데 어떤걸까요.. ? I/BiChannelGoogleApi(21852): [FirebaseAuth: ] getGoogleApiForMethod() returned Gms: com.google.firebase.auth.api.internal.zzaq@53783c9 D/FirebaseAuth(21852): Notifying id token listeners about user ( JkAgW8bUPWZ6WWe8s1eZZxfJRj23 ). E/flutter (21852): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: type 'User' is not a subtype of type 'FirebaseUser' E/flutter (21852): #0 _LoginPageState._handleSignIn (package:instagram_clone/login_page.dart:47:24) E/flutter (21852): E/flutter (21852): #1 _LoginPageState.build. (package:instagram_clone/login_page.dart:33:17) E/flutter (21852): #2 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:992:19) E/flutter (21852): #3 _InkResponseState.build. (package:flutter/src/material/ink_well.dart:1098:38) E/flutter (21852): #4 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:184:24) E/flutter (21852): #5 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:524:11) E/flutter (21852): #6 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:284:5) E/flutter (21852): #7 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:219:7) E/flutter (21852): #8 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:477:9) E/flutter (21852): #9 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:78:12) E/flutter (21852): #10 PointerRouter._dispatchEventToRoutes. (package:flutter/src/gestures/pointer_router.dart:124:9) E/flutter (21852): #11 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:377:8) E/flutter (21852): #12 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:122:18) E/flutter (21852): #13 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:108:7) E/flutter (21852): #14 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:220:19) E/flutter (21852): #15 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:200:22) E/flutter (21852): #16 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:158:7) E/flutter (21852): #17 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:104:7) E/flutter (21852): #18 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:88:7) E/flutter (21852): #19 _rootRunUnary (dart:async/zone.dart:1206:13) E/flutter (21852): #20 _CustomZone.runUnary (dart:async/zone.dart:1100:19) E/flutter (21852): #21 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7) E/flutter (21852): #22 _invoke1 (dart:ui/hooks.dart:267:10) E/flutter (21852): #23 _dispatchPointerDataPacket (dart:ui/hooks.dart:176:5) E/flutter (21852):