Lapa-authentication

- add new call for /generate_access_token.

**Full Changelog**: https://github.com/B21amish/lapa_authentication/compare/0.0.13...0.0.14

- add custom message and status code for duplicate username.
- delete session if already present on same device for same user.
- encrypt mac_address in login and register.
- keep seperate secret keys for access token refresh token and mac address encrpytion.

**Full Changelog**: https://github.com/B21amish/lapa_authentication/compare/0.0.12...0.0.13

**Full Changelog**: https://github.com/B21amish/lapa_authentication/compare/0.0.11...0.0.12

**Full Changelog**: https://github.com/B21amish/lapa_authentication/compare/0.0.10...0.0.11

fix missing dependencies in setup.py

**Full Changelog**: https://github.com/B21amish/lapa_authentication/compare/0.0.8...0.0.9