using owner in an identifier

[mainvtm]

Environment information

System:
  OS: Windows 10 10.0.19045
  CPU: (8) x64 Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz
  Memory: 17.07 GB / 31.96 GB
Binaries:
  Node: 22.12.0 - C:\Program Files\nodejs\node.EXE
  Yarn: 1.22.17 - ~\AppData\Roaming\npm\yarn.CMD
  npm: 9.6.4 - C:\Program Files\nodejs\npm.CMD
  pnpm: undefined - undefined
NPM Packages:
  @aws-amplify/auth-construct: 1.3.2
  @aws-amplify/backend: 1.5.1
  @aws-amplify/backend-auth: 1.2.0
  @aws-amplify/backend-cli: 1.3.0
  @aws-amplify/backend-data: 1.1.5
  @aws-amplify/backend-deployer: 1.1.5
  @aws-amplify/backend-function: 1.7.1
  @aws-amplify/backend-output-schemas: 1.4.0
  @aws-amplify/backend-output-storage: 1.1.2
  @aws-amplify/backend-secret: 1.1.4
  @aws-amplify/backend-storage: 1.2.1
  @aws-amplify/cli-core: 1.1.3
  @aws-amplify/client-config: 1.5.0
  @aws-amplify/deployed-backend-client: 1.4.2
  @aws-amplify/form-generator: 1.0.3
  @aws-amplify/model-generator: 1.0.8
  @aws-amplify/platform-core: 1.1.0
  @aws-amplify/plugin-types: 1.3.0
  @aws-amplify/sandbox: 1.2.3
  @aws-amplify/schema-generator: 1.2.4
  aws-amplify: 6.6.6
  aws-cdk: 2.163.1
  aws-cdk-lib: 2.163.1
  typescript: 5.6.3
AWS environment variables:
  AWS_NODEJS_CONNECTION_REUSE_ENABLED = 1
  AWS_SDK_LOAD_CONFIG = 1
  AWS_STS_REGIONAL_ENDPOINTS = regional
No CDK environment variables

Describe the bug

I'm trying to use identifier to ensure that each user only adds an email address once (email is unique per owner).

Reproduction steps

If I leave it as optional (as per the documentation), i can't use owner in the identifier

const schema = a.schema({
  Contact: a
    .model({
      firstName: a.string().required(),
      lastName: a.string().required(),
      email: a.string().required(),
      owner: a
        .string()
        .authorization((allow) => [allow.owner().to(['read'])]),
      address: a.string().required(),
    })
    .authorization((allow) => [
      allow.owner().to(['create', 'read', 'update', 'delete']),
    ])
    .identifier(['owner', 'email']), // error: Type '"owner"' is not assignable to type '"firstName" | "lastName" | "email" | "address"'
)

However if set owner as required, I cannot create rows as I wouild need to supply owner.

const schema = a.schema({
  Contact: a
    .model({
      firstName: a.string().required(),
      lastName: a.string().required(),
      email: a.string().required(),
      owner: a
        .string()
        .required()
        .authorization((allow) => [allow.owner().to(['read'])]),
      address: a.string().required(),
    })
    .authorization((allow) => [
      allow.owner().to(['create', 'read', 'update', 'delete']),
    ])
    .identifier(['owner', 'email']),
)

/*...*/

const contact: any = {
  firstName: "jack",
  lastName: "jones",
  email: "[email protected]",
  address: "lonely",
};

const response = await client.models.Contact.create(contact);
// error: "Variable 'input' has coerced Null value for NonNull type 'String!'

/*...*/

const contact: any = {
  owner: auth.user.userId,
  firstName: "jack",
  lastName: "jones",
  email: "[email protected]",
  address: "lonely",
};

const response = await client.models.Contact.create(contact);
//  Unauthorized on [owner]