how can i transfer property 'user' of type Text into type List of Variant

if(isnull(or(ri!a,ri!b)),{},a!forEach(
  items:rule!KONE_Development_CSE_TENDER_PHASES_Search_Rule(ri!a),
  expression:a!localVariables(
    local!csetenderphases:fv!item,
    a!forEach(
      items:rule!KONE_Development_CSE_TENDER_Search_Rule(local!csetenderphases.tenderId),
      expression:
      if(local!csetenderphases.tenderId=fv!item.id,
      if(or(fv!item.statusId="3",fv!item.statusId="4"),{},{
        a!update(data:local!csetenderphases,index:"user",value:ri!b)
      })
      ,{})
    )
  )
).list.user
)

As title, i need transfer all value to be correct form to be saved

thank you all