我正在使用nodemailer和googleapis从我的Next.js API路由发送电子邮件，但收到以下错误：Error：Missing Credentials for“Plain”
我按照以下教程进行了设置：https://blog.devgenius.io/correct-way-in-setting-up-nodemailer-for-email-service-946f6bfd73e8
我还查看了nodemailer文档，以确保一切都是最新的。3LO身份验证设置的节点邮件文档示例：https://nodemailer.com/smtp/oauth2/#example-3
以下是我的代码：

const handleSendVerificationEmail = async (req: NextApiRequest, res: NextApiResponse) => {
    const { body } = req
    const { email }: { email: string } = body

    const user = process.env.GOOGLE_EMAIL_ADDRESS
    const clientId = process.env.GOOGLE_CLIENT_ID_MAIL
    const clientSecret = process.env.GOOGLE_CLIENT_SECRET_MAIL
    const refreshToken = process.env.GOOGLE_REFRESH_TOKEN
    const redirectURI = process.env.GOOGLE_REDIRECT_URI

    const oAuth2Client = new google.auth.OAuth2(clientId, clientSecret, redirectURI)
    oAuth2Client.setCredentials({ refresh_token: refreshToken })

    try {
        const accessToken = await oAuth2Client.getAccessToken()

        const transporter = nodemailer.createTransport({
            host: 'smtp.gmail.com',
            port: 465,
            secure: true,
            auth: {
                type: '0Auth2',
                user,
                clientId,
                clientSecret,
                refreshToken,
                accessToken
            },
            tls: {
                rejectUnauthorized: false
            }
        })

        const mailOptions = {
            from: `YourTable <${user}>`,
            to: email,
            subject: 'Hello from gmail using API',
            text: 'Hello from gmail email using API',
            html: '<h1>Hello from gmail email using API</h1>'
        }

        const result = await transporter.sendMail(mailOptions)
        res.status(200).json({ email })

    } catch (error) {
        console.log(error)
        res.status(500).json({ error: 'Unable to send verification email' })
    }
}

export default handleSendVerificationEmail

我还向传输器添加了TLS属性，就像我找到的一些教程中所建议的那样，尽管它没有解决问题。
我还尝试跳过主机、端口和安全属性，代之以服务。再说一次，这并没有起到什么作用。
按照注解中的建议，我按照说明进行了操作，并相应地更改了代码：

const user = process.env.GOOGLE_EMAIL
        const pass = process.env.GOOGLE_APP_PASSWORD

        const transporter = nodemailer.createTransport({
            port: 465,
            host: "smtp.gmail.com",
            auth: {
              user: user,
              pass: pass
            },
            secure: true
          })

        const mailOptions = {
            from: `YourTable <${user}>`,
            to: email,
            subject: 'Hello from gmail using API',
            text: 'Hello from gmail email using API',
            html: '<h1>Hello from gmail email using API</h1>'
        }

        const result = await transporter.sendMail(mailOptions)

但同样的错误再次出现：

Error: Missing credentials for "PLAIN"
    at SMTPConnection._formatError (H:\Dokumente\Programming_Projects\yourtable\node_modules\nodemailer\lib\smtp-connection\index.js:790:19)
    at SMTPConnection.login (H:\Dokumente\Programming_Projects\yourtable\node_modules\nodemailer\lib\smtp-connection\index.js:444:38)
    at H:\Dokumente\Programming_Projects\yourtable\node_modules\nodemailer\lib\smtp-transport\index.js:272:32
    at SMTPConnection.<anonymous> (H:\Dokumente\Programming_Projects\yourtable\node_modules\nodemailer\lib\smtp-connection\index.js:213:17)
    at Object.onceWrapper (node:events:641:28)
    at SMTPConnection.emit (node:events:527:28)
    at SMTPConnection.emit (node:domain:475:12)
    at SMTPConnection._actionEHLO (H:\Dokumente\Programming_Projects\yourtable\node_modules\nodemailer\lib\smtp-connection\index.js:1325:14)
    at SMTPConnection._processResponse (H:\Dokumente\Programming_Projects\yourtable\node_modules\nodemailer\lib\smtp-connection\index.js:953:20)
    at SMTPConnection._onData (H:\Dokumente\Programming_Projects\yourtable\node_modules\nodemailer\lib\smtp-connection\index.js:755:14) {
  code: 'EAUTH',
  command: 'API'
}