また来週
$ heroku config:set SLACK_API_TOKEN_WORKSPACE_A=xoxb-abcdefghijklmnopqrstuvwxyz0123456789
$ heroku config:set SLACK_API_TOKEN_WORKSPACE_B=xoxb-abcdefghijklmnopqrstuvwxyz0123456789
$ heroku addons:create scheduler:standard
$ heroku addons:open scheduler