def DBMSMainMenu(username):
     while (True):
         print('User in session: ' + username)
         logging.warning('User in session: ' + username)
         userInput = functions.display_DBMS_options()
         if (userInput == "1"):
             Execution.ExecutionMenu(username)
         elif (userInput == "2"):
             with open(db_log, 'r') as f:
                 for line in f:
                     print(line)
         elif (userInput == "3"):
             db_name = input("Enter a DB Name: ")
             with open(dd_path + db_name + '.json', 'r') as f:
                 for line in f:
                     print(line)
         elif (userInput == "4"):
             dbname = input("Enter a new Database Name: ")
             createDump(dbname)
         elif (userInput == "5"):
             dbname = input("Enter a new Database Name: ")
             generateERD(dbname)
         elif (userInput == "6"):
             isLoggedIn = user_class.User.logOut()
             break
         else:
             print("Please enter a valid option...")
         print("\n")