code: async def membership(client: Client, membership_signed_raw: str) -> ClientResponse:
      
      return await client.post(MODULE + '/membership', {'membership': membership_signed_raw}, rtype=RESPONSE_AIOHTTP)
docs: POST a Membership document
  
      :param client: Client to connect to the api
      :param membership_signed_raw: Membership signed raw document
      :return: