input: 
  def refresh_data_in_postgresql():
      """ 
      Refresh a given table of data in a PostgreSQL database every 5 minutes.
      
      >>> service = refresh_data_in_postgresql()
      >>> print("Service is refreshing data...")
      Printing message indicating the service is active.
      """
      import psycopg2
      from datetime import datetime, timedelta
      import schedule
      import time
      
      conn = psycopg2.connect(
       host="localhost", 
       database="db", 
       user="user", 
       password="password"
      )
  
      def refresh_data():
          cur = conn.cursor()
          query = 'REFRESH TABLE "TableName";'
          cur.execute(query)
          conn.commit()
  
      # run the refresh_data job every 5 minutes
      schedule.every(5).minutes.do(refresh_data)
  
      while True:
          schedule.run_pending()
          time.sleep(1)
  
output:     return conn