title: IBM-Watson Text to Speech throws "403:Forbidden" Error
body: <p>I am trying to use IBM watson api for text to speech service. The service works if I use curl command but when I try to use the srrvice using Python SDK, It throws me below error.</p>
  
  <blockquote>
    <p>Traceback (most recent call last):
      File "/anaconda3/lib/python3.6/site-packages/ibm_cloud_sdk_core/base_service.py", line 234, in send
        response.status_code, error_message, http_response=response)
    ibm_cloud_sdk_core.api_exception.ApiException: Error: Forbidden, Code: 403
    Method failed with status code 403: Forbidden</p>
  </blockquote>
  
  <p>Below is the curl command</p>
  
  <pre><code>curl -X GET -u "apikey:myapiKey" --output hello_world.wav "https://api.eu-de.text-to-speech.watson.cloud.ibm.com/text-to-speech/api/v1/synthesize?accept=audio/wav&amp;text=Hallo%20Welt&amp;voice=de-DE_DieterVoice"
  </code></pre>
  
  <p>Below is the python code</p>
  
  <pre><code>from ibm_watson import TextToSpeechV1
  from ibm_cloud_sdk_core.authenticators import IAMAuthenticator
  
  
  from ibm_watson import ApiException
  import json
  
  IBM_API_ENDPOINT = "https://api.eu-de.text-to-speech.watson.cloud.ibm.com/text-to-speech/api/v1/synthesize"
  
  
  IBM_TTS_API_KEY = "myAPIKey"
  
  authenticator = IAMAuthenticator(IBM_TTS_API_KEY)
  text_to_speech = TextToSpeechV1(authenticator=authenticator)
  text_to_speech.set_service_url(IBM_API_ENDPOINT)
  
  
  try:
      with open('IBM.wav', 'wb') as audio_file:
          audio_file.write(text_to_speech.synthesize("Hallo world", voice='de-DE_DieterVoice', accept='audio/wav').get_result().content)
  
  except ApiException as ex:
      print("Method failed with status code " + str(ex.code) + ": " + ex.message)
  </code></pre>