in python

Exercise 3 An information system uses a server with a simple authentication mechanism through a user name and a password per user. For this purpose, the server uses a file named AuthenticationFile.dat that stores for each user the user name and the corresponding password. A: Write a python implementation of a client program that can prompt the user to input the username and password, then send the username and the password properly to the server. Based on the response of the server, the client program should display Welcome, if the username and password are valid Invalid login otherwise B: Write a python implementation of the server program that receives a user name and a password, and checks if the password is the same as the one corresponding to the username in the AuthenticationFile.dat. The Server should respond with "Welcome" for valid login and "Invalid login" otherwise. The server should be able to handle multiple clients concurrently