code: def replication_connection_string_and_slot_using_pgpass(target_node_info):
      
      connection_info, slot = connection_info_and_slot(target_node_info)
      connection_info["dbname"] = "replication"
      connection_info["replication"] = "true"
      connection_string = create_pgpass_file(connection_info)
      return connection_string, slot
docs: Like `connection_string_and_slot_using_pgpass` but returns a
      connection string for a replication connection.