Dialogflow uses this user id for following purposes: 1) Billing and measurement. If user with the same obfuscatedExternalUserId is created in a later conversation, dialogflow will know it's the same user. 2) Agent assist suggestion personalization. For example, Dialogflow can use it to provide personalized smart reply suggestions for this user.
Please never pass raw user ids to Dialogflow. Always obfuscate your user id first.
Dialogflow only accepts a UTF-8 encoded string, e.g., a hex digest of a hash function like SHA-512.
The length of the user id must be <= 256 characters.
map (key: string, value: string)
Optional. Key-value filters on the metadata of documents returned by article suggestion. If specified, article suggestion only returns suggested documents that match all filters in their Document.metadata. Multiple values for a metadata key should be concatenated by comma. For example, filters to match all documents that have 'US' or 'CA' in their market metadata values and 'agent' in their user metadata values will be