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):

$cache_directory = getcwd() ;
$rapcs_metar = 'rapcs_metar' ;
// SMTP local parameters
$smtp_host = 'vyn****org' ;
$smtp_port = 785 ; // Unusual TCP port as OVH blocks the usual 587 :(
// SMTP credentials are in auth.php
//$smtp_user = 'x****' ; 
//$smtp_password = 'x****' ;

// The shared secret for direct access to booking is in auth.php
//$shared_secret = "X****" ;

// Credential for email account sending invoices is in auth.php

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

Sincerely,
Emma