Assignment from Variable to Position in Flow

Create a variable object in the flow and point to the Connection tab from the object's properties. Select the relevant document and select the object that specifies the id of the user in the document

Click the assignment tab from the properties of the assignment object created in the flow. Select the target position object to the target object. Select the resource type, the position value from the variable value. Select the variable that holds the user id in the flow in the process of the select object button below