@spec texttospeech_voices_list(Tesla.Env.client(), keyword(), keyword()) ::
  {:ok, GoogleApi.TextToSpeech.V1beta1.Model.ListVoicesResponse.t()}
  | {:ok, Tesla.Env.t()}
  | {:ok, list()}
  | {:error, any()}

Returns a list of Voice supported for synthesis.

Parameters

• connection (type: GoogleApi.TextToSpeech.V1beta1.Connection.t) - Connection to server
• optional_params (type: keyword()) - Optional parameters
  • :"$.xgafv" (type: String.t) - V1 error format.
  • :access_token (type: String.t) - OAuth access token.
  • :alt (type: String.t) - Data format for response.
  • :callback (type: String.t) - JSONP
  • :fields (type: String.t) - Selector specifying which fields to include in a partial response.
  • :key (type: String.t) - API key. Your API key identifies your project and provides you with API access, quota, and reports. Required unless you provide an OAuth 2.0 token.
  • :oauth_token (type: String.t) - OAuth 2.0 token for the current user.
  • :prettyPrint (type: boolean()) - Returns response with indentations and line breaks.
  • :quotaUser (type: String.t) - Available to use for quota purposes for server-side applications. Can be any arbitrary string assigned to a user, but should not exceed 40 characters.
  • :uploadType (type: String.t) - Legacy upload protocol for media (e.g. "media", "multipart").
  • :upload_protocol (type: String.t) - Upload protocol for media (e.g. "raw", "multipart").
  • :languageCode (type: String.t) - Optional. Recommended. BCP-47 language tag. If not specified, the API will return all supported voices. If specified, the ListVoices call will only return voices that can be used to synthesize this language_code. For example, if you specify "en-NZ", all "en-NZ" voices will be returned. If you specify "no", both "no-\*" (Norwegian) and "nb-\*" (Norwegian Bokmal) voices will be returned.
• opts (type: keyword()) - Call options

Returns

• {:ok, %GoogleApi.TextToSpeech.V1beta1.Model.ListVoicesResponse{}} on success
• {:error, info} on failure