Lowercase letters, numbers, and hyphens only. 3-30 characters.
Your overlay: cricwidget.com/live/your-slug

Where do I find these?

API Token: Log into play-cricket.com. Go to My Account, then Settings, then API Tokens. Copy your active token.

Site ID: Your Site ID is the number in your club's Play-Cricket URL. For example, if your page is play-cricket.com/clubs/12345/matches, your Site ID is 12345.