Configure ini file on User Name

I am running on the latest version of WinSCP. My requirement is as follows.
I have created three individual files Windows Batch Files for Upload/Download/Delete.
I configured the .ini file in such a way if the user name is given it should connect to my SFTP server based on the details saved in the file. I have added the below code at last. We are having a custom port number.
Not sure where it's going wrong. System considering Username as Hostname and getting terminated. No special chars in the password.

Sorry, I do not understand the purpose of the INI file. And your example is far from complete.

In any case your command-line is wrong. First, it should be winscp.com, not win.com. And you are missing the /command switch:
https://winscp.net/eng/docs/commandline#scripting

It's a typo error while deleting the credentials.
My goal is to hardcode the SFTP connection details(id and Password) in the config file and call the command open <> with only the hostname.

So show us code and INI file that you believe are correct (without the typos). And corresponding session log file.