Run groovy script as another user

[Sam Huawey]

I have a groovy script in Post Function for one of workflows in ServiceDesk. It creates objects in Assets. I found out that these assets are created by the user that performs transition. 

Is it possible to perform this task as another user? We have a special service account in ServiceDesk called Automate.

I create assets using code like this:

def objectTypeRecord = objectTypeFacade.loadObjectTypeBean(8);

/* Create a new unsaved object bean */
def objectBean = objectTypeRecord.createMutableObjectBean();

/* Set up the attribute list */
def attrBeans = new ArrayList();  

// .....

objectBean.setObjectAttributeBeans(attrBeans);
objectBean = objectFacade.storeObjectBean(objectBean);

[Sam Huawey]

As an alternative I can use REST API and provide a token of Automate account, but it would be nice to stay inside groovy.