Security-related question about a possible exposed credential

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):**

```
accountName, apiKey, ok := r.BasicAuth()
if !ok {
// Credentials not provided.
err := &APIError{
Code: CodeCredentialsMissing,
Message: "You must authenticate.",
Hint: "Try using multyvac.config.set_key(api_key='us****me', api_secret_key='A****ey', api_url='') before calling other multyvac methods.",
Retry: false,
}
err.Report(http.StatusUnauthorized, w)
return nil, err
}

```

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

Sincerely,
Emma