===============
heroku config:set FB_ACCESS_TOKEN=your_access_token
heroku config:set FB_VERIFY_TOKEN=your_verify_token
heroku config:set API_AI_ACCESS_TOKEN=your_api_api_access_token
===============
heroku config:set FB_ACCESS_TOKEN=your_access_token
heroku config:set FB_VERIFY_TOKEN=your_verify_token
heroku config:set API_AI_ACCESS_TOKEN=your_api_api_access_token