getUsername.System: Retrieves the name of the user running R
Description
Retrieves the name of the user running R.Usage
System$getUsername(...)
synopsis
getUsername.System(static, ...)Details
First, this function checks the system environment variables USER,
  and USERNAME.
  Second, it checks Sys.info()["user"] for user name details.
  Finally, it tries to query the system command whoami.