将Stripe API中的数据写入golang的CSV文件中

我正在尝试检索Stripe数据并将其解析为CSV文件。这是我的代码：

package main

import (
    "github.com/stripe/stripe-go"
    "github.com/stripe/stripe-go/invoice"
    "fmt"
    "os"
    "encoding/csv"
)

func main() {
    stripe.Key = "" // I can't share the API key
    params := &stripe.InvoiceListParams{}
    params.Filters.AddFilter("limit", "", "3")
    params.Filters.AddFilter("status", "", "paid")
    i := invoice.List(params)

    // Create a CSV file
    csvdatafile, err := os.Create("./mycsvfile.csv")
    if err != nil {
        fmt.Println(err)
    }
    defer csvdatafile.Close()
    // Write Unmarshaled json data to CSV file
    w := csv.NewWriter(csvdatafile)
    //Column title
    var header []string
    header = append(header, "ID")
    w.Write(header)
    for i.Next() {
        in := i.Invoice()
        fmt.Printf(in.ID) // It is working
        w.Write(in) // It is not working
    }
    w.Flush()
    fmt.Println("Appending succed")
}

当我运行程序时，go run *.go出现以下错误：

./main.go:35:10: cannot use in (type *stripe.Invoice) as type []string in argument to w.Write

我认为我离解决方案不远。我只需要了解如何正确地在CSV文件中写w.Write()命令就可以了。