attachments?

(MessageAttachment)[]

(Optional)

channelId

string

The unique identifier of the channel to which the message is sent.

elements?

(Element)[]

(Optional)

forward?

MessageForward

(Optional)

mentions?

(string)[]

(Optional) A list of user IDs mentioned in the message.

messageId?

string

(Optional) The unique identifier of the message. If not provided, an ID will be auto-generated.

quote?

MessageQuote

(Optional)

text?

string

(Optional)

userId?

string

(Optional) The unique identifier of the user when a service token is used.