1. In line 6 of the source code, we can see that the password is base64 encoded, and the encoded password is at line 31
2. I use Python to decode the password

┌──(kali㉿kali)-[~/code]
└─$ python3
Python 3.11.2 (main, Mar 13 2023, 12:18:29) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import base64
>>> base64.b64decode(b'cGwzYXMzX2wzdF9tM18xbnQwX3RoM19zYWYz')
b'pl3as3_l3t_m3_1nt0_th3_saf3'