Add Cognito Users to a Group

users.py

# Before running, make sure you set your ~/.aws/credentials and ~/.aws/config properly.
# Just run:  aws configure
# Then enter your access key, secret key and region.

import boto3

client = boto3.client('cognito-idp')
user_pool_id = '<<USER POOL ID>>'       # Change to your user pool ID
group_name = 'MY_GROUP'                 # Change to whatever group you want.  Make sure it exists first.

def add_user_to_group(user_pool_id, group_name, username):
    try:
        response = client.admin_add_user_to_group(
            UserPoolId=user_pool_id,
            Username=username,
            GroupName=group_name
        )
        print(f"User {username} added to group {group_name}")
    except client.exceptions.UserNotFoundException:
        print(f"User {username} not found in the user pool.")
    except client.exceptions.GroupNotFoundException:
        print(f"Group {group_name} not found in the user pool.")
    except Exception as e:
        print(f"An error occurred: {e}")

users = [
    'Moe.Howard',
    'Larry.Fine',
    'Shemp.Howard',
]

for user in users:
    add_user_to_group(user_pool_id, group_name, user)