Smartauthen

Code and documentation improvements:

- Enabled the class to be used without creating an instance.
- Added documentation to the code for better understanding.
- Updated the documentation section in the README.
- Simplified the process of enhancing the security of the public key.

The code is now more user-friendly and secure!

smartauthen v0.2.2 fix errors.

Fix errors.

Smart, simple, lightweight, secure cross-platform authentication for any application.