Terraform for_each array list using format and index

users.tf

locals {
  users = [
    "SCREENSM1",
    "SCREENSM2",
    "SCREENSM3",
    "SCREENSM4",
    "SCREENSA1",
    "SCREENSA2",
    "SCREENSA3",
    "SCREENSA4",
    "SCREENSA5",
    "SCREENSA6",
  ]
}

resource "okta_user" "user" {
  for_each                  = toset(local.users)
  email                     = format("%s@mail.com", each.key)
  login                     = each.key
  first_name                = each.key
  last_name                 = each.key
  custom_profile_attributes = format("{ \"id\": \"888%s\" }", index(local.users, each.key))
  status                    = "ACTIVE"
  password                  = var.user_password
}