PhoneAuthScreenVM constructor Null safety

1. farmershands
2. phone_auth_screen_vm
3. PhoneAuthScreenVM
4. PhoneAuthScreenVM constructor

PhoneAuthScreenVM class

1. Constructors
2. PhoneAuthScreenVM
3. Properties
4. confirmController
5. hashCode
6. runtimeType
7. Methods
8. noSuchMethod
9. onTapConfirm
10. toString
11. Operators
12. operator ==