Returns an array of Voice objects available for the user
API key to be included in the x-api-key header
Filter voices by language
ENGLISH, SPANISH, FRENCH, PORTUGUESE, BRAZILIAN_PORTUGUESE, GERMAN, RUSSIAN, HINDI, CHINESE, DUTCH, ARABIC Filter voices by gender
MALE, FEMALE An array of voices
ENGLISH, SPANISH, FRENCH, PORTUGUESE, BRAZILIAN_PORTUGUESE, GERMAN, RUSSIAN, HINDI, CHINESE, DUTCH, ARABIC MALE, FEMALE