Security-related question about a possible exposed credential

[Emma-NYL]

Hello,

My name is Emma, I am conducting an academic study on possible credential exposure in public GitHub repositories.

While analyzing this repository, I found a string that may represent a credential. I'm including the code snippet below containing possible leakage. To avoid exposing sensitive information publicly, I marked the sensitive information.

Could you please help clarify whether the detected string is:

1. a real credential, or
2. a placeholder / example value?

Thank you for your time.

---

Code snippet (sensitive values masked):

    }

    public static Session createSession() {

        //填写你自己的信息
        String username = "***************";//	邮箱发送账号
        String password = "***************";//	邮箱授权码

        Properties props = new Properties();

        props.put("mail.smtp.host", "smtp.qq.com");//	SMTP主机名

        props.put("mail.smtp.port", "587");//	主机端口号

Thank you in advance for your time - I really appreciate it!

Sincerely,
Emma

[ConstStrings]

It is a a placeholder / example value.