The following utils are currently generally available. You can use them in any block and they will be rendered as the (obvious) result depending on which user is running the process and at what time:
{{ utils.ds }} -> Date stamp in the format YYYY-MM-DD. I.E.: 2023-06-23
{{ utils.ds_yesterday }} -> Datestamp yesterday. As above, for the date of the day preceding the execution.
{{ utils.user_uid }} -> returns the unique ID of the user executing the workflow.
{{ utils.user_email}} -> returns the email of the user executing the workflow.
{{ utils.user_name }} -> returns the last name of the user executing the workflow.
{{ utils.user_first_name }} -> returns the first name of the user executing the workflow.