expiresAt property
ExpiresAt is when the key stops working, as a unix timestamp in seconds. Zero means it never expires; a past timestamp is refused.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
int? expiresAt;