user = authenticate(username, password)

username = self.cleaned_data.get('username')
password = self.cleaned_data.get('password')

# check if user exists
try:
    user = User.objects.get(username=username)
except User.DoesNotExist:
    user = None

#check if user is_active
if user.is_active:
    user_active = true
else
    user_active = false

#check the password

if user_active:
    password_match = user.check_password(password):
else:
    password_match = false

if password_match:
    msg = "Login Successful"
else:
    msg = "Login Failed"