<｜begin▁of▁sentence｜>### Instruction:
As a software developer, when working on a user management system that requires generating unique IDs for new users, how can we keep track of the number of unique IDs generated after creating IDs for five new users? This information would help us monitor the growth of our user base and ensure that each user is assigned a distinct identifier.
### Response:
from networkx.utils import UniqueIdGenerator

# Initialize the unique ID generator
unique_id_gen = UniqueIdGenerator()

# Generate some unique IDs
for _ in range(5):
    print(unique_id_gen())

# Check the number of unique items generated
number_of_items = len(unique_id_gen)
print('Number of unique items generated:', number_of_items)
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