You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: postgres_readfile.rb
    path of file: ./repos/metasploit-framework/modules/auxiliary/admin/postgres
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::Postgres
  include Msf::Auxiliary::Report
  include Msf::OptionalSession::PostgreSQL

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'PostgreSQL Server Generic Query',
      'Description'    => %q{
          This module imports a file local on the PostgreSQL Server into a
          tempo
    
  def run
    self.postgres_conn = session.client if session
    ret = postgres_read_textfile(datastore['RFILE'])
    case ret.keys[0]
    when :conn_error
      print_error "#{rhost}:#{rport} Postgres - Authentication failure, could not connect."
    when :sql_error
      case ret[:sql_error]
      when /^C58P01/
        print_error "#{postgres_conn.peerhost}:#{postgres_conn.peerport} Postgres - No such file or directory."
        vprint_status "#{postgres_conn.peerhost}:#{postgres_conn.peerport} Postgres - #{ret[:sql_error]}"
      when /^C42501/
        print_error "#{postgres_conn.peerhost}:#{postgres_conn.peerport} Postgres - Insufficient file permissions."
        vprint_status "#{postgres_conn.peerhost}:#{postgres_conn.peerport} Postgres - #{ret[:sql_error]}"
      else
        print_error "#{postgres_conn.peerhost}:#{postgres_conn.peerport} Postgres - #{ret[:sql_error]}"
      end