code: def resolve_addresses(user, useralias, to, cc, bcc):
      
      addresses = {"recipients": []}
      if to is not None:
          make_addr_alias_target(to, addresses, "To")
      elif cc is not None and bcc is not None:
          make_addr_alias_target([user, useralias], addresses, "To")
      else:
          addresses["recipients"].append(user)
      if cc is not None:
          make_addr_alias_target(cc, addresses, "Cc")
      if bcc is not None:
          make_addr_alias_target(bcc, addresses, "Bcc")
      return addresses
docs: Handle the targets addresses, adding aliases when defined