formatting current date in specific date format

Summary:

I'm using a REST connector to call a REST API from OPA. As part of that I need to send current date in YYYY-MM-DD format in the data association.

I know I can use 'now' to get the current date time but do not know how to format it.

Appreciate your help.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

OPA 23.10

Code Snippet (add any code snippets that support your topic, if applicable):