相关疑难解决方法(0)

我正在尝试通过nodemailer发送电子邮件，但无法发送电子邮件并显示以下错误。

{ [Error: Invalid login]
  code: 'EAUTH',
  response: '534-5.7.14 <https://accounts.google.com/ContinueSignIn?sarp=1&scc=1&plt=AKgnsbsTr\n534-5.7.14 2r0PE8hXz57GMK9aydA3GouUGQr1Pc2wBywEf6i09kKVOv9Qv5y9Csy_lL-PIgUO6ML8uA\n534-5.7.14 ZsEiEkpAU0N5aiQBZdI1urKo3XfCiiS2MhjiUZaBgpn88sFXR-sBeA5ydMc_Md1F5wDcbX\n534-5.7.14 7ynrcVC-h0H_-e_ptvGhA3ywiHOSoDZAxzrindvEMNkXmCilbo9J7ITdlXFKwQjITaIkei\n534-5.7.14 Tk8QMKEY22ldNjE78Lh2ekheLd5M> Please log in via your web browser and\n534-5.7.14 then try again.\n534-5.7.14  Learn more at\n534 5.7.14  https://support.google.com/mail/answer/78754 21sm9309692qgj.21 - gsmtp',
  responseCode: 534 }

我正在使用如nodemailer文档中所示的确切代码。

这是我正在使用的服务器端代码。

var transporter = nodemailer.createTransport({
    service: 'Gmail',
    auth: {
       user: 'username',
       pass: 'password'
    }
});

app.post('/sendfeedbackmail', function(req, res) {

    var mailOptions = {
        from: 'Feedback<username@gmail.com>', // sender address 
        to: 'user1@gmail.com', // receiver 
        subject: 'Subject', // Subject line 
        text: mailData, // plaintext …