How does WinSCP uses the password

I am rookie at using Winscp, and have been tasked with deciphering some scripts used for transferring files.
We have a batch file that is scheduled to run on daily basis, which has the following line :

C:\"program files"\WinSCP\winscp.exe /console /script=c:\"program files"\winscp\nenesftp.txt

The neneftp.txt file reads as:
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option batch continue
option confirm off
open sftp://marina@66.226.72.149
lcd Y:\complete

How do I find out/where should I search to find the password used for "marina" account?

Thanks in advance for your help

There's no password in the script. Possibilities are:

- no password is required by the server
- the script relies on a Pagent authentication agent to provide a private key, see https://winscp.net/eng/docs/ui_pageant
- there's a stored site named marina@66.226.72.149 that has the password (or an unencrypted private key) saved.

You can tell easily from a session log file. If not, attach it here.