title: "Daily Limit Exceeded" error in python google.cloud (translate)
body: <p>I want to DETECT the language of a text (and not translate) using google API.
  This does not require authentications and I don't need a key.
  The code is as simple as:</p>
  
  <pre><code>from google.cloud import translate
  def detect_language(text):
      """Detects the text's language."""
      translate_client = translate.Client()
      result = translate_client.detect_language(text)
  
      print('Text: {}'.format(text))
      print('Confidence: {}'.format(result['confidence']))
      print('Language: {}'.format(result['language']))
  
  print detect_language('My name is Maria')
  </code></pre>
  
  <p>However the error "google.cloud.exceptions.Forbidden: 403 Daily Limit Exceeded" pops up.
  I checked my usage and made sure that I did not pass the quota ().
  Also, the google translate API is enabled in console.</p>
  
  <p>Any clue where does this error come from?</p>
  
  <p>In another attempt, I tried this code with a key:</p>
  
  <pre><code>from google.cloud import translate
  from googleapiclient.discovery import build
  
  API_KEY = 'MY_KEY_COMES_HERE'
  
  API = 'translate'
  
  service = build(API, 'v2', developerKey=API_KEY)
  print(service.translations().list(source='en', target='fr', q=['flower', 'car']).execute())
  
  def detect_language(text):
      """Detects the text's language."""
      translate_client = translate.Client()
      result = translate_client.detect_language(text)
  
      print('Text: {}'.format(text))
      print('Confidence: {}'.format(result['confidence']))
      print('Language: {}'.format(result['language']))
  print detect_language('My name is Maria')
  </code></pre>
  
  <p>It does translate .... but it does NOT detect the language</p>