object Users : Table() {
    val id = integer("id").autoIncrement()
    val email = varchar("email", 255)
    val password = varchar("password", 255)
    
    override val primaryKey: PrimaryKey? = PrimaryKey(id)
    
    override suspend fun getAllUsers(): Iterable<User> = dbQuery {
        Users.selectAll().map {
            toUser(it)
        }
    }
}

suspend fun <T> dbQuery(block: () -> T): T =
    withContext(Dispatchers.IO) {
        transaction { block() }
    }