How do you programatically determine who submitted a webform?

Question

When I add a value element to a new webform draft and I attempt to prepopulate the element with a token listed as available, the element does not get populated.

Answer 1

@beltouche: It should be noted that this YAML source creates a webform that internally stores the displayname property. As a result the identified user is stored wherever the webform submissions are stored. I now assume this is as designed. It seems to me that the prepopulation of a webform using something like {{ user.displayname }} is best accomplished by using a block/webform hybrid content type. Am I on the right track with this thinking?