copied and adapted from github.com/creack/pty StartWithAttrs assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout, and c.Stderr, calls c.Start, and returns the File of the tty's corresponding pty.

adapted from github.com/creack/pty StartWithSize assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout, and c.Stderr, calls c.Start, and returns the File of the tty's corresponding pty.

* Returns a boolean stating whether the user is correctly authenticated on this * server.