无法通过sengrid v3 api发送电子邮件（java.io.IOException：请求返回状态码401）

gstackoverflow：

我尝试通过sendGrid发送电子邮件。

我已经在网站上创建了api密钥：

并编写了以下代码：

Email fromEmail = new Email("[email protected]");
            subject = "Sending with SendGrid is Fun";
            Email toEmail = new Email("[email protected]");
            Content content = new Content("text/plain", "and easy to do anywhere, even with Java");
            Mail mail = new Mail(fromEmail, subject, toEmail, content);

            SendGrid sg = new SendGrid("9Vh5Wz9CQryyXVhWMFFQSw");
            Request request = new Request();
            try {
                request.setMethod(Method.POST);
                request.setEndpoint("mail/send");
                request.setBody(mail.build());
                Response response = sg.api(request);
                System.out.println(response.getStatusCode());
                System.out.println(response.getBody());
                System.out.println(response.getHeaders());
            } catch (IOException ex) {
                throw ex;
            }

我得到以下异常：

java.io.IOException: Request returned status Code 401Body:{"errors":[{"message":"The provided authorization grant is invalid, expired, or revoked","field":null,"help":null}]}
    at com.sendgrid.Client.executeApiCall(Client.java:287)
    at com.sendgrid.Client.post(Client.java:192)
    at com.sendgrid.Client.api(Client.java:310)
    at com.sendgrid.SendGrid.makeCall(SendGrid.java:151)
    at com.sendgrid.SendGrid.api(SendGrid.java:173)
    at pack.shared.email.EmailMessage$EmailService.sendEmail(EmailMessage.java:387)

我做错了什么？

niclaszll：

不要使用API KEY ID。创建API密钥后，您将必须使用SendGrid显示的生成的密钥。如果您错过写下它，则需要创建一个新密钥。

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