Create a CSV file by entering user-id and password, read and search the password for given userid

import csv

def create_user(user_id):
  password = input('Enter a password: ')
  with open('users.csv', 'a') as csvfile:
    fieldnames = ['user_id', 'password']
    writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
    writer.writerow({'user_id': user_id, 'password': password})

def find_password(user_id):
  with open('users.csv', 'r') as csvfile:
    reader = csv.DictReader(csvfile)
    for row in reader:
      if row['user_id'] == user_id:
        print(row['password'])

create_user('123')
find_password('123')