findAuthenticationFromEnvironment function Null safety

Authentication findAuthenticationFromEnvironment()

Looks for GitHub Authentication information from the current environment.

If in a browser context, it will look through query string parameters first and then sessionStorage.

If in a server, command line or Flutter context it will use the system environment variables.

In both contexts it delegates to findAuthenticationInMap to find the github token or username and password.


Authentication findAuthenticationFromEnvironment() =>