I can't figure out how to insert records, docs seem old. When I try to assign the values in the insert it says val cannot be reassigned, like its ignoring the insert part. Any help?

transaction {
    Categories.insert {

    }
}

object Categories : Table() {
    val category = varchar("category", 255)
    val description = varchar("description", 255)
    override val primaryKey = PrimaryKey(category, name = "PK_Category_category")
}