Python 3 break statement

[Larz60+]

Try this:
#find out an available username
# -*- coding: utf-8 -*-

import re

current_users=['vlad','kate','tania','mike','david']

def get_user():
    while True:
        name_user = raw_input('Please, enter new username: ')
        if not  re.match("^[A-Za-z0-9_-]*$", name_user):
            print("\nSorry it is a special symbols, please try again")
            continue
        elif name_user in current_users:
            print("\n Sorry,but  " + str(name_user) + "  the name is not available")
            continue
        print("your USERNAME=" + str(name_user) + "  is approved")
        current_users.append(name_user)
        print('current_users: {}'.format(current_users))
        break

if __name__ == '__main__':
    get_user()