curl -X POST https://api.vapi.ai/assistant \ -H "Authorization: Bearer {bearer}" \ -H "Content-Type: application/json" \ -d '{ "voice": { "provider": "playht", "voiceId": "s3://voice-cloning-zero-shot/d633fd1b-57ae-42eb-812b-9d87e847ed25/fc4b1428-3b49-40cd-923a-edc38a6d9b34/manifest.json", "model": "PlayDialog" }, "credentials": [ { "provider": "playht", "apiKey": "{secret_key}", "userId": "{user_id}", "name": "fc4b1428-3b49-40cd-923a-edc38a6d9b34" } ] }' returns { "message": "Voice s3://voice-cloning-zero-shot/d633fd1b-57ae-42eb-812b-9d87e847ed25/fc4b1428-3b49-40cd-923a-edc38a6d9b34/manifest.json not found for provider playht", "error": "Bad Request", "statusCode": 400 }