send slack message from shell the easy way use: https://api.slack.com/custom-integrations/legacy-tokens to get your auth key
usage: fastslack [-h] [--store] [-u USER | -c CHANNEL] [-a AUTH] [-m MESSAGE]
[--as-user]
optional arguments:
-h, --help show this help message and exit
--store store defaults
-u USER, --dest-user USER
destination slack user
-c CHANNEL, --dest-channel CHANNEL
destination slack channel
-a AUTH, --auth AUTH slack authentication token
-m MESSAGE, --message MESSAGE
--as-user send message as user