username = input ("Login: ")
user1 = "example"
user2= "example2"

if username == user1:
   print ("Please enter your password")
elif username == user2:
   print ("Please enter your password")
else:
   print ("Access Denied")
   quit()

password = input ("Password: ")
user1 = "example"
user2 = "example"

if password == user1:
print ("Welcome back", user1)
elif password == user2:
     print ("Welcome back", user2)
else:
print ("Access Denied")
quit()