Creates a user email address

curl --request POST \
  --url https://api.rootly.com/v1/users/{user_id}/email_addresses \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "user_email_addresses",
    "attributes": {
      "email": "<string>"
    }
  }
}
'

{
  "data": {
    "id": "a8608840-7af2-4dfe-928c-c99405b7acdc",
    "type": "user_email_addresses",
    "attributes": {
      "user_id": 603,
      "email": "[email protected]",
      "primary": false,
      "verified_at": null,
      "created_at": "2025-12-05T21:29:30.104-08:00",
      "updated_at": "2025-12-05T21:29:30.104-08:00"
    }
  }
}