code: def read_startup_message(self) -> Dict[bytes, bytes]:
      self.logger.debug("reading startup message")
      length = self.read_int32()
      version = self.read_int32()
      major_version = version >> 16
      minor_version = version & 0xFFFF
      message = self.read_parameters(length - 8)
      self.logger.debug(
          "PSQL Startup Message %d.%d : %s"
          % (major_version, minor_version, message)
      )
      parameters = {}
      while len(message) != 0:
          key = message.pop(0)
          value = message.pop(0)
          parameters[key] = value
      parameters[b"major_version"] = major_version
      parameters[b"minor_version"] = minor_version
      return parameters
  
imports: import struct
  from typing import List, Any, BinaryIO, Sequence, Dict
  from mindsdb.api.postgres.postgres_proxy.utilities import strip_null_byte
  from mindsdb.utilities import log
  import time
  from mindsdb.api.postgres.postgres_proxy.postgres_packets.postgres_fields import PostgresField
  from mindsdb.api.postgres.postgres_proxy.postgres_packets.postgres_message_identifiers import PostgresBackendMessageIdentifier, PostgresFrontendMessageIdentifier, PostgresAuthType
label_desc: Use image node_id 10 for calling the PostgresPacketReader obj's underlying member method code with example usage: obj.read_startup_message() and returns: parameters