Write documentation for activityleaderboard/security/jwt/JwtUtils.java

[Ayush0Chaudhary]

You are tasked with creating documentation for this file. Your documentation should provide guidance to potential future contributors who are already familiar with the syntax and want to understand how the code functions.

[prnv7703]

can i do this?

[yp969803]

@prnv7703 PLease try to set up the project ping me if you face any issue