text: api_url = "https://api.robinhood.com"
  
  def login():
      return api_url + "/oauth2/token/"
  
  def logout():
      return api_url + "/oauth2/revoke_token/"
  
  def investment_profile():
      return api_url + "/user/investment_profile/"
  
  def accounts():
      return api_url + "/accounts/"
  
  def ach(option):
      '''
      Combination of 3 ACH endpoints. Options include:
          * iav
          * relationships
          * transfers
      '''
      return api_url + "/ach/iav/auth/" if option == "iav" else api_url + "/ach/{_option}/".format(_option=option)
  
  def applications():
      return api_url + "/applications/"
  
  def dividends():
      return api_url + "/dividends/"
  
  def edocuments():
      return api_url + "/documents/"
  
  def instruments(instrumentId=None, option=None):
      '''
      Return information about a specific instrument by providing its instrument id.
      Add extra options for additional information such as "popularity"
      '''
      return api_url + "/instruments/" + ("{id}/".format(id=instrumentId) if instrumentId else "") + ("{_option}/".format(_option=option) if option else "")
  
  def margin_upgrades():
      return api_url + "/margin/upgrades/"
  
  def markets():
      return api_url + "/markets/"
  
  def notifications():
      return api_url + "/notifications/"
  
  def orders(orderId=None):
      return api_url + "/orders/" + ("{id}/".format(id=orderId) if orderId else "")
  
  def password_reset():
      return api_url + "/password_reset/request/"
  
  def portfolios():
      return api_url + "/portfolios/"
  
  def positions():
      return api_url + "/positions/"
  
  def quotes():
      return api_url + "/quotes/"
  
  def historicals():
      return api_url + "/quotes/historicals/"
  
  def document_requests():
      return api_url + "/upload/document_requests/"
  
  def user():
      return api_url + "/user/"
  
  #def watchlists():
  #    return api_url + "/watchlists/"
  
  def watchlists(listId=None):
      return api_url + "/watchlists/" + ("{id}/".format(id=listId) if listId else "")
  
  def news(stock):
      return api_url + "/midlands/news/{_stock}/".format(_stock=stock)
  
  def fundamentals():
      return api_url + "/fundamentals/"
  
  #def fundamentals(stock):
  #    return api_url + "/fundamentals/{_stock}/".format(_stock=stock)
  
  def tags(tag=None):
      '''
      Returns endpoint with tag concatenated.
      '''
      return api_url + "/midlands/tags/tag/{_tag}/".format(_tag=tag)
  
  def chain(instrumentid):
      return api_url + "/options/chains/?equity_instrument_ids={_instrumentid}".format(_instrumentid=instrumentid)
  
  def options(chainid, dates, option_type):
      return api_url + "/options/instruments/?chain_id={_chainid}&expiration_dates={_dates}&state=active&tradability=tradable&type={_type}".format(_chainid=chainid, _dates=dates, _type=option_type)
  
  def market_data(optionid):
      return api_url + "/marketdata/options/{_optionid}/".format(_optionid=optionid)
  
  def convert_token():
      return api_url + "/oauth2/migrate_token/"
  