How to use the ibm-cloud-sdk-core.getAuthenticatorFromEnvironment function in ibm-cloud-sdk-core

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('tone_analyzer');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('watson_vision_combined');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('discovery');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('compare-comply');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('personality_insights');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('conversation');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('text_to_speech');
    }
    super(options);
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('language_translator');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('watson_vision_combined');
    }
    super(options);
    // check if 'version' was provided
    if (typeof this.baseOptions.version === 'undefined') {
      throw new Error('Argument error: version was not specified');
    }
    this.baseOptions.qs.version = options.version;
  }

constructor(options: UserOptions) {
    // If the caller didn't supply an authenticator, construct one from external configuration.
    if (!options.authenticator) {
      options.authenticator = getAuthenticatorFromEnvironment('natural_language_classifier');
    }
    super(options);
  }