str
Highly recommended for logged-in users. Unique identifier
for logged-in user, such as a user name. Don't set for
anonymous users.
Always use a hashed value for this ID.
Don't set the field to the same fixed ID for different
users. This mixes the event history of those users together,
which results in degraded model quality.
The field must be a UTF-8 encoded string with a length limit
of 128 characters. Otherwise, an INVALID_ARGUMENT error is
returned.
user_agent
str
User agent as included in the HTTP header. Required for
getting [SearchResponse.sponsored_results][].
The field must be a UTF-8 encoded string with a length limit
of 1,000 characters. Otherwise, an INVALID_ARGUMENT error is
returned.
This should not be set when using the client side event
reporting with GTM or JavaScript tag in
UserEventService.CollectUserEvent
or if [direct_user_request][] is set.