Temporary commit
Move TokenChecker
Re-implement tokenChecker as class
Add ServiceProvider for TokenChecker
Fix to use TokenChecker
Add findUserById() method
Add test for TokenChecker
Fix to be testable
Add test
Add test
Fix CS
Add test
Add test
Add tests
Fix CS
Fix CS
Temporary commit
Move TokenChecker
Re-implement tokenChecker as class
Add ServiceProvider for TokenChecker