Facebook::Graph::role::save_token - Provides a save_token method to save token value to YAML config file.
Updates token value in configfile and saves as YAML if modified.
If configfile is not defined, the token is printed to STDOUT for manual saving.
Andrew Grangaard <email@example.com>
This software is copyright (c) 2012 by Andrew Grangaard.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.