How to obtain the user or possible users in charge of performing a task?

I solved it in the following way:

List possibleUsers = apiAccessor.getProcessAPI().getPossibleUsersOfHumanTask(processDefinitionId, "Step2", 0, 10)
logger.warning("possibleUsers --> " + possibleUsers)
// I get the id of the first user in the list.
def userId = possibleUser[0].id

It should be noted that in the process I do not have any actor filter defined.