How to use the knack.prompting.prompt function in knack

def test_prompt_msg_question_with_help_string(self, _):
        expected_result = 'My response'
        with mock.patch('knack.prompting._input', side_effect=['?', expected_result]):
            with mock.patch('sys.stdout', new_callable=StringIO) as mock_stdout:
                actual_result = prompt('Please enter some text: ', help_string='Anything you want!')
                self.assertEqual(expected_result, actual_result)
                self.assertIn('Anything you want!', mock_stdout.getvalue())

def _prompt_for_prop_input(prop_name, prop_type):
    verify_is_a_tty_or_raise_error('The template requires a few inputs. These cannot be provided as in command '
                                   'arguments. It can only be input interatively.')
    val = prompt(msg='Please enter a value for {prop_name}: '.format(prop_name=prop_name),
                 help_string='Value of type {prop_type} is required.'.format(prop_type=prop_type))
    print('')
    return val

ext_repos.append(path)
            display('Repo {} OK.'.format(path))
            return True

        # Determine extension repos
        # Allows the user to simply press RETURN to use their cwd, assuming they are in their desired extension
        # repo directory. To use multiple extension repos or identify a repo outside the cwd, they must specify
        # the path.
        if prompt_y_n('\nDo you plan to develop CLI extensions?'):
            display('\nGreat! Input the paths for the extension repos you wish to develop for, one per '
                    'line. You can add as many repos as you like. (TIP: to quickly get started, press RETURN to '
                    'use your current working directory).')
            first_repo = True
            while True:
                msg = '\nPath ({}): '.format('RETURN to use current directory' if first_repo else 'RETURN to continue')
                ext_repo_path = prompt(msg, None)
                if not ext_repo_path:
                    if first_repo and not add_ext_repo(os.getcwd()):
                        first_repo = False
                        continue
                    break
                add_ext_repo(os.path.abspath(os.path.expanduser(ext_repo_path)))
                first_repo = False

        display('\nTIP: you can manage extension repos later with the `azdev extension repo` commands.')

        # Determine extensions
        if ext_repos:
            if prompt_y_n('\nWould you like to install certain extensions by default? '):
                display('\nGreat! Input the names of the extensions you wish to install, one per '
                        'line. You can add as many repos as you like. Press RETURN to continue to the next step.')
                available_extensions = [x['name'] for x in list_extensions()]

if not config_exists or should_modify_global_config:
        # no config exists yet so configure global config or user wants to modify global config
        with ConfiguredDefaultSetter(config, False):
            output_index = prompt_choice_list(MSG_PROMPT_GLOBAL_OUTPUT, OUTPUT_LIST,
                                              default=get_default_from_config(config,
                                                                              'core', 'output',
                                                                              OUTPUT_LIST))
            answers['output_type_prompt'] = output_index
            answers['output_type_options'] = str(OUTPUT_LIST)
            enable_file_logging = prompt_y_n(MSG_PROMPT_FILE_LOGGING, default='n')
            allow_telemetry = prompt_y_n(MSG_PROMPT_TELEMETRY, default='y')
            answers['telemetry_prompt'] = allow_telemetry
            cache_ttl = None
            while not cache_ttl:
                try:
                    cache_ttl = prompt(MSG_PROMPT_CACHE_TTL) or DEFAULT_CACHE_TTL
                    # ensure valid int by casting
                    cache_value = int(cache_ttl)
                    if cache_value < 1:
                        raise ValueError
                except ValueError:
                    logger.error('TTL must be a positive integer')
                    cache_ttl = None
            # save the global config
            config.set_value('core', 'output', OUTPUT_LIST[output_index]['name'])
            config.set_value('core', 'collect_telemetry', 'yes' if allow_telemetry else 'no')
            config.set_value('core', 'cache_ttl', cache_ttl)
            config.set_value('logging', 'enable_log_file', 'yes' if enable_file_logging else 'no')

def prompt_not_empty(msg, help_string=None):
    """
    Wrapper on knacks prompt function which does not return until non none value is recieved from user input.
    """
    if not help_string:
        help_string = 'This field cannot be left blank.'
    user_input = None
    while not user_input:
        user_input = prompt(msg=msg, help_string=help_string)
    return user_input

value = ''
                    no_tty = True

                if value == '':
                    value = {} if param_type == 'object' else []
                else:
                    try:
                        value = shell_safe_json_parse(value)
                    except Exception as ex:  # pylint: disable=broad-except
                        logger.error(ex)
                        continue
                result[param_name] = value
                break
            else:
                try:
                    result[param_name] = prompt(prompt_str, help_string=description)
                except NoTTYException:
                    result[param_name] = None
                    no_tty = True
                break
    if no_tty and fail_on_no_tty:
        raise NoTTYException
    return result

answers['login_index'] = method_index
            answers['login_options'] = str(LOGIN_METHOD_LIST)
            profile = Profile(cli_ctx=cli_ctx)
            interactive = False
            username = None
            password = None
            service_principal = None
            tenant = None
            if method_index == 0:  # device auth
                interactive = True
            elif method_index == 1:  # username and password
                username = prompt('Username: ')
                password = prompt_pass(msg='Password: ')
            elif method_index == 2:  # service principal with secret
                service_principal = True
                username = prompt('Service principal: ')
                tenant = prompt('Tenant: ')
                password = prompt_pass(msg='Client secret: ')
            elif method_index == 3:  # skip
                return
            try:
                profile.find_subscriptions_on_login(
                    interactive,
                    username,
                    password,
                    service_principal,
                    tenant)
                login_successful = True
                logger.warning('Login successful!')
            except AdalError as err:
                logger.error('Login error!')
                logger.error(err)

def process_github_repository(self):
        while (
                not self.github_repository or
                not AzureDevopsBuildProvider.check_github_repository(self.github_pat, self.github_repository)
        ):
            self.github_repository = prompt(msg="Github Repository Path (e.g. Azure/azure-cli): ").strip()
        self.logger.warning("Successfully found Github repository.")

if registry:
        if registry.admin_user_enabled:
            logger.info("Attempting with admin credentials...")
            try:
                cred = cf_acr_registries(cli_ctx).list_credentials(resource_group_name, registry_name)
                return login_server, cred.username, cred.passwords[0].value
            except CLIError as e:
                logger.warning("%s: %s", ADMIN_USER_BASE_ERROR_MESSAGE, str(e))
        else:
            logger.warning("%s: %s", ADMIN_USER_BASE_ERROR_MESSAGE, "Admin user is disabled.")
    else:
        logger.warning("%s: %s", ADMIN_USER_BASE_ERROR_MESSAGE, resource_not_found)

    # 4. if we still don't have credentials, prompt the user
    try:
        username = prompt('Username: ')
        password = prompt_pass(msg='Password: ')
        username, password = _get_token_with_username_and_password(
            login_server, username, password, repository, artifact_repository, permission, is_login_context
        )
        return login_server, username, password
    except NoTTYException:
        raise CLIError(
            'Unable to authenticate using AAD or admin login credentials. ' +
            'Please specify both username and password in non-interactive mode.')

    return login_server, None, None