erica push insecurely echoes password to console

```
% erica push . default
==> couchapp (push)
==> Successfully pushed. You can browse it at: http://myuser:mypassword@127.0.0.1:5984/mydb/_design/myapp/_rewrite/
```

This is a shoulder-surfing risk. It would be better to strip at least the password from the URL.

Start by locating the code that handles the `erica push` command and prints the successful push URL. Trace how that URL is assembled, then verify the console output no longer exposes the password while retaining the usable destination URL.

Written by the indexing model from the issue text.