Connect GroupMe
Paste a developer access token from the account that can see the team events.
No Google Calendar API. No OAuth review. Just a subscribe link.
Turn a GroupMe team calendar into a link anyone can subscribe to.
Group Me Calendar Sync reads events from a GroupMe group and publishes a private iCal (.ics) URL. Add that URL in Google Calendar, Apple Calendar, or Outlook. Alexa and Skylight can then follow the Google calendar you subscribed.
Get a token at dev.groupme.com → Access Token. Use the GroupMe account that is in the softball group.
Publish a feed
Check every team GroupMe. Each one gets a public https://…ics link, plus one combined URL.
Subscribe
Each person adds the URL in Google Calendar. They do not need this app or any API keys.