Add prefix to each key in Terraform

Secrets in Hashicorp Vault are not prefixed while the app expects them prefixed. Example: secret is named SendgridKey in HCP, but I need APP_SendgridKey.

To insert all of them, but prefix them before applying:

data "hcp_vault_secrets_app" "some_secrets" {
  app_name = "some_secrets"
}

locals {
  # data.hcp_vault_secrets_app.some_secrets.secrets : {
  prefixed_secrets = { for key, value in data.hcp_vault_secrets_app.some_secrets.secrets : "APP_${key}" => value }
}

resource "kubernetes_secret" "some_secrets" {
  metadata {
    name      = "some_secrets"
  }

  data = local.prefixed_secrets
}