How to grant a role on a specific CloudSQL instance?

locals{

  instance_admins = {

  "db-group": "group:gcp-ccoe-sre@mycloud.io",

  "dev-team": "user:dp@mycloud.io"

  }

}

resource "google_project_iam_member" "instance_admin" {

  for_each = var.instance_admins

  project  = "my-first-project"

  role     = "roles/cloudsql.admin"

  member   = each.value

  condition{

      title       = "cloudsql admin role for db team"

      description = "cloudsql admin role for db team"

      expression  = "resource.name == \"${google_sql_database_instance.instance.self_link}\""

  }

}