If you downloaded a file from the StandardSharing telegram channel that had a password, the password was right there on the posting.
Some other channels are reposting with their own password. Just check the source of your download.

If you downloaded something here on egpet, then that post would have its own password.
Most of us here put egpet.net as the password but others have their member name as the password.
Read through the whole thread or private message the one who posted it.