Multiple availability domains?

How can I have it check multiple? I had `OCI_AVAILABILITY_DOMAIN=['PoxX:US-ASHBURN-AD-1','PoxX:US-ASHBURN-AD-2','PoxX:US-ASHBURN-AD-3']` And I'm getting this error `{ "code": "CannotParseRequest", "message": "Incorrectly formatted request. Please refer to our documentation for help." }`