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):

#include "RunningMedian.h"

RunningMedian pm25s = RunningMedian(19);
RunningMedian pm10s = RunningMedian(19);

char* ssid = "[Wi-****SID]";
char* password = "[Wi-Fi****sword]";
String api_key = "[ThingSpeak****te API Key]";

//#define PLAIVE_SERVER_ENABLE
#define THINGSPEAK_SERVER_ENABLE

boolean wifi_ready;

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

Sincerely,
Emma