current oauth-token method is outdated. consider migration plan

[ITJamie]

slack recommend (and try to push users) to make "slack apps" rather than the current oauth token setup being used.
https://api.slack.com/legacy/oauth

[dr-yd]

I can't even get it to work at all, with neither of the listed methods. That at least needs to be clarified a bit further. Probably a bad idea to use this pack as a first attempt at learning StackStorm... not a good first impression.