code: def _get_account_number(self, token, uuid):
          
          # Data
          data = {"accessToken": token,
                  "uuid": uuid}
          # Http request
          try:
              raw_res = yield from self._session.post(ACCOUNT_URL,
                                                      data=data,
                                                      headers=self._headers,
                                                      timeout=self._timeout)
          except OSError:
              raise PyFidoError("Can not get account number")
          # Load answer as json
          try:
              json_content = yield from raw_res.json()
              account_number = json_content\
                              .get('getCustomerAccounts', {})\
                              .get('accounts', [{}])[0]\
                              .get('accountNumber')
          except (OSError, ValueError):
              raise PyFidoError("Bad json getting account number")
          # Check collected data
          if account_number is None:
              raise PyFidoError("Can not get account number")
  
          return account_number
docs: Get fido account number.