byChatCode
fun byChatCode(chatCode: ID, content: String, type: MessageType = MessageType.TEXT, quote: ID? = null, nonce: String? = null): DirectMessageCreateRequest
fun byChatCode(chatCode: ID, content: String, type: Int, quote: ID? = null, nonce: String? = null): DirectMessageCreateRequest
通过 chatCode 构建一个 DirectMessageCreateRequest api实例。