Invite new members to public Slack community
invite.sh [-h] [-t legacyToken] [-e email] [-f filename]
usage:
-h show this help text
-t Slack legacy token (api.slack.com/custom-integrations/legacy-tokens)
-e invite by email
-f invite multiple emails from file
./invite.sh -t ttt -e xxx@yyy.com
./invite.sh -t ttt -f emails.txt