TokenManagerKey constructor Null safety

1. baguette
2. TokenManagerKey
3. TokenManagerKey
4. TokenManagerKey constructor

TokenManagerKey class

1. Constructors
2. TokenManagerKey
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Constants
12. TAG
13. UPDATE_TOKEN