title: Facebook OAuthException error "Invalid OAuth access token"
body: <p>I'm walking through the marketing API quickstart and I am too the point where I have generated a user token with the graph api and then run the code below, but its telling me the token is invalid- I created it with all the permissions.</p>
  
  <p>I can use the graph api with the same token to do a GET-> me/adaccounts and it works, but running Python on my PC does not.</p>
  
  <pre><code>#Add to header of your file
  from facebookads.api import FacebookAdsApi
  from facebookads import objects
  
  #Initialize a new Session and instanciate an Api object
  my_app_id = 'myappID'
  my_app_secret = '{MySeceret}'
  my_access_token = '{MyAccesstoken}'
  FacebookAdsApi.init(my_app_id, my_app_secret, my_access_token)
  
  #Add to header of your file
  from facebookads.objects import AdUser
  
  #Add after FacebookAdsApi.init
  me = AdUser(fbid='me')
  my_account = me.get_ad_accounts()[0]
  </code></pre>
  
  <p>print my_account</p>
  
  <p>THis is the error I get:</p>
  
  <pre><code>Press ENTER or type command to continue
  Traceback (most recent call last):
    File "fbapp.py", line 19, in &lt;module&gt;
      my_account = me.get_ad_accounts()[0]
    File "/home/morty/fbapp/facebookads/adobjects/helpers/adaccountusermixin.py", line 55, in get_ad_accounts
      return self.iterate_edge(AdAccount, fields, params, endpoint='adaccounts')
    File "/home/morty/fbapp/facebookads/adobjects/abstractcrudobject.py", line 539, in iterate_edge
      cursor.load_next_page()
    File "/home/morty/fbapp/facebookads/api.py", line 782, in load_next_page
      params=self.params,
    File "/home/morty/fbapp/facebookads/api.py", line 318, in call
      raise fb_response.error()
  facebookads.exceptions.FacebookRequestError: 
  
    Message: Call was not successful
    Method:  GET
    Path:    https://graph.facebook.com/v2.6/me/adaccounts
    Params:  {'summary': 'true'}
  
    Status:  400
    Response:
      {
        "error": {
          "message": "Invalid OAuth access token.", 
          "code": 190, 
          "type": "OAuthException", 
          "fbtrace_id": "Gop9F3vWJvk"
        }
      }
  
  
  shell returned 1
  </code></pre>