PinChange constructor Null safety

1. nevis_mobile_authentication_sdk
2. nevis_mobile_authentication_sdk
3. PinChange
4. PinChange constructor

PinChange class

1. Constructors
2. PinChange
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. execute
8. noSuchMethod
9. onError
10. onSuccess
11. pinChanger
12. toString
13. username
14. Operators
15. operator ==