Update multiple entries in a collection

Very new to strapi and I am struggling with updating multiple items in a collection in one api call using GraphQL.
I can not find any info on how this is achieved I can find update 1 item only:

mutation {
  updateUser(
    input: {
      where: { id: "5b28f1747c739e4afb48605c" }
      data: { username: "John", email: "john@doe.com" }
    }
  ) {
    user {
      username
      email
    }
  }
}

Is this possible? Or have I been wasting my time?
Thanks