=union(ri!array, cast(typeof(ri!array), {}))

if(
  rule!isnullorempty(
    ri!username
  ),
  false,
  isusernametaken(
    ri!username
  )
)

joinarray(
  {dec2hex(toint(rand(4)*256),2),
  "-",
  dec2hex(toint(rand(2)*256),2),
  "-",
  dec2hex(toint(rand(2)*256),2),
  "-",
  dec2hex(toint(rand(2)*256),2),
  "-",
  dec2hex(datetext(now(),"yyyy"),3),
  dec2hex(datetext(now(),"MMdd"),3),
  dec2hex(datetext(now(),"HHmm"),3),
  dec2hex(datetext(now(),"SSss"),3)}
)

if(
  isnull(ri!userId),
  "User Not Provided",
  if(
    rule!usernameexists(ri!userId),
    user(touser(ri!userId), "firstName") & " " & user(touser(ri!userId), "lastName"),
    "Not Found"
  )
)