Check if a number exists in a Cognito User Pool

cognito_check_if_number_in_use.py

#!/usr/bin/python

import boto3
import json

# Query Parameters:
# Phone Number we need to look up
phone_num = "+xxxxxxxxxxxxx"

# In which User Pool?
userpool = 'xx-xxxx-x_xxxXXXxxx'

cognito = boto3.client("cognito-idp")
response = cognito.list_users(
    UserPoolId=userpool,
    AttributesToGet=[
        'phone_number',
    ],
    Filter="phone_number=\"{}\"".format(phone_num))

print("Number in userpool?")
print(response['Users'])

if response['Users']:
	print(True)
else:
	print(False)