A random alphanumeric string that functions as a password
    authorizing a server connection. The format of the token depends
    on the authorization scheme in use. MIT-MAGIC-COOKIE-1 uses a
    128-bit string known as a magic cookie. MIT-KERBEROS-5 uses an
    encrypted string to authorize server connections. This string
    is stored separately. The token entry in the X authority file
    represents the encoded location of the Kerberos keytab file and
    associated principal name, which is referenced by the server to
    locate the encrypted string.