django add user to group

from django.contrib.auth.models import Group, User
 
g = Group.objects.get(name='My Group Name')
users = User.objects.all()
for u in users:
    g.user_set.add(u)

from django.contrib.auth.models import Group
my_group = Group.objects.get(name='my_group_name') 
my_group.user_set.add(your_user)