Hey @Saandhy_Ganeriwala1,
The credentials it is asking for are set for the desktop app install you are using.
If you go to your users Home directory and view the hidden files there will be an n8n folder, In there you will find a file called n8n-desktop.env
this will contain the credentials you are looking for.
On Windows you can just pop %HOMEPATH%\.n8n
into the file explorer to get there if needed as well.
For Mac (and Linux when released) you can just pop open a terminal window and run cat ~/.n8n/n8n-desktop.env