This action marks all of a user's unread messages as read in certain group channels. If channels aren't specified, the user's unread messages in all group channels are marked as read.
The following table lists the parameters that this action supports.
Specifies the unique ID of a user.
The following table lists the properties of an HTTP request that this action supports.
array of strings
Specifies an array of one or more group channel URLs where unread messages need to be marked as read. If not specified, unread messages in all group channels a user joined are marked as read.
If successful, this action returns an empty response body.
In the case of an error, an error object like below is returned. See the error codes section for more details.