Create speaker

curl --request POST \
  --url https://api.beyondwords.io/v1/speakers \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "first_name": "Jane",
  "last_name": "Doe",
  "avatar_url": "https://example.com/avatar.jpg"
}
'

{
  "id": 1,
  "first_name": "Jane",
  "last_name": "Doe",
  "avatar_url": "https://example.com/avatar.jpg",
  "created": "2023-12-31T00:00:00.000Z",
  "updated": "2023-12-31T00:00:00.000Z",
  "custom_voices": [
    {
      "id": 1
    },
    {
      "name": "Jane"
    },
    {
      "script_ids": [
        123,
        456
      ]
    },
    {
      "cloning_status": "script-preparation"
    },
    {
      "created": "2023-12-31T00:00:00.000Z"
    },
    {
      "updated": "2023-12-31T00:00:00.000Z"
    }
  ],
  "voices": [
    {
      "id": 1
    },
    {
      "name": "Jane"
    }
  ]
}