title: "Error 403: access_denied" from Google authentication web api despite google account being owner
body: <p>I'm using the default code provided from google <a href="https://developers.google.com/sheets/api/quickstart/python" rel="noreferrer">here</a>, and I don't quite understand why its not working. The code outputs the prompt <code>Please visit this URL to authorize this application: [google login URL]</code>. When attempting to log in with the account designated as owner of the script under the google developers console I get a <code>Error 403: access_denied</code> error with the message <code>The developer hasn’t given you access to this app. It’s currently being tested and it hasn’t been verified by Google. If you think you should have access, contact the developer [the email I just tried to log in with].</code></p>
  <pre><code>from __future__ import print_function
  import pickle
  import os.path
  from googleapiclient.discovery import build
  from google_auth_oauthlib.flow import InstalledAppFlow
  from google.auth.transport.requests import Request
  
  # If modifying these scopes, delete the file token.pickle.
  SCOPES = ['https://www.googleapis.com/auth/spreadsheets.readonly']
  
  # The ID and range of a sample spreadsheet.
  SAMPLE_SPREADSHEET_ID = '1vrZpCGW58qCCEfVXoJYlwlulraIlfWI2SmFXa1iPtuU'
  SAMPLE_RANGE_NAME = 'Class Data!A2:E'
  
  def main():
      &quot;&quot;&quot;Shows basic usage of the Sheets API.
      Prints values from a sample spreadsheet.
      &quot;&quot;&quot;
      creds = None
      # The file token.pickle stores the user's access and refresh tokens, and is
      # created automatically when the authorization flow completes for the first
      # time.
      if os.path.exists('token.pickle'):
          with open('token.pickle', 'rb') as token:
              creds = pickle.load(token)
      # If there are no (valid) credentials available, let the user log in.
      if not creds or not creds.valid:
          if creds and creds.expired and creds.refresh_token:
              creds.refresh(Request())
          else:
              flow = InstalledAppFlow.from_client_secrets_file(
                  'Google_API_Key.json', SCOPES)
              creds = flow.run_local_server(port=0)
          # Save the credentials for the next run
          with open('token.pickle', 'wb') as token:
              pickle.dump(creds, token)
  
      service = build('sheets', 'v4', credentials=creds)
  
      # Call the Sheets API
      sheet = service.spreadsheets()
      result = sheet.values().get(spreadsheetId=SAMPLE_SPREADSHEET_ID,
                                  range=SAMPLE_RANGE_NAME).execute()
      values = result.get('values', [])
  
      if not values:
          print('No data found.')
      else:
          print('Name, Major:')
          for row in values:
              # Print columns A and E, which correspond to indices 0 and 4.
              print('%s, %s' % (row[0], row[4]))
  
  def PrintToSheets():
      main()
  </code></pre>