Can I have a label instead of value display ?

[sarah2627]

When I select an user for exemple, this displays in input-textarea the value but it is not very clean because it contains a uuid. Is it possible to display something other than the value or at least in the uuid?

The 3 steps :

When I select an user (OK) :

When an user is selected (NOK) :

When I submit (OK) :

Thanks in advance :)