TokenManager constructor Null safety

1. baguette
2. TokenManager
3. TokenManager
4. TokenManager constructor

TokenManager class

1. Constructors
2. TokenManager
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. addPlugin
8. cleanPlugins
9. getPlugin
10. getToken
11. noSuchMethod
12. removePlugin
13. setToken
14. toString
15. Operators
16. operator ==
17. Constants
18. TAG