findPassword - incorrect documentation

[Rob--W]

From https://github.com/atom/node-keytar/blob/0e1757ae895f63ece9c8641e112b892cbdff34cf/README.md#findpasswordservice :

findPassword(service)

Find a password for the service in the keychain.

service - The string service name.

Yields the string password, or null if an entry for the given service and account was not found.

Which given account? This docs looks like a copy-paste error from the getPassword method.
#36 questioned before why this function was needed, and although it has been closed, the question is still open - what is the purpose of findPassword ?

[shiftkey]

I think this is just a convenience function for situations where you don't need the account value. I'm going to tidy this up in #150. If that's not enough, maybe we can talk about deprecating it.