Missing parameter in exchange_token() call

[Tolsto]

Version

4.16.2

Describe the bug

_UserTokenClientImpl#exchange_token requires the connection name as a parameter. It doesn't get passed here which causes an exception.

botbuilder-python/libraries/botbuilder-dialogs/botbuilder/dialogs/_user_token_access.py

Lines 105 to 109 in 1617885

	return await user_token_client.exchange_token(
	user_id,
	channel_id,
	token_exchange_request,
	)