curl --request GET \
  --url https://app.altheastudio.ai/api/accounts/me/tts_api_keys \
  --header 'X-API-Key: <api-key>'

{
  "elevenLabs": {
    "prefix": "<string>"
  },
  "cartesia": {
    "prefix": "<string>"
  },
  "lmnt": {
    "prefix": "<string>"
  },
  "google": {
    "prefix": "<string>"
  },
  "inworld": {
    "prefix": "<string>"
  },
  "respeecher": {
    "prefix": "<string>"
  }
}