I need to send an email after a mutation. My graphql schema saves to the database using the @model directive but I want to add to it and send an email after the mutation. Can someone please recommend the best way to do this? Below is my graphql schema.

enum Service {
  AIRPORT_PICKUP
  AIRPORT_DROPOFF
  GUIDED_TOUR
  DRIVER
}

type Message
@model
@auth(
  rules: [
    { allow: public, provider: iam, operations: [create] }
    { allow: groups, groups: ["admin"], operations: [update, delete, read] }
  ]
) {
  id: ID!
  firstName: String!
  lastName: String!
  email: AWSEmail!
  phoneCountryCode: String
  phoneNumber: String
  message: String!
  arrivalFlightNumber: String
  arrivalDateTime: AWSDateTime
  departurelFlightNumber: String
  departureDateTime: AWSDateTime
  travelers: Int
  services: [Service]
  owner: String
  group: String
}