SMHUserUpdatePhoneApis constructor Null safety

1. smh_flutter_sdk
2. smh_user_updatephone_apis
3. SMHUserUpdatePhoneApis
4. SMHUserUpdatePhoneApis constructor

SMHUserUpdatePhoneApis class

1. Constructors
2. SMHUserUpdatePhoneApis
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. sendSmsCode
13. updatePhone
14. Constants
15. urlPrefix