I am trying to automate the deploy process with the Google AppEngine Launcher, and the one thing getting in my way is the password enquiry; I am trying to set it up so that I don't have to enter my password after the first time.

1. One approach I am looking at is to somehow ensure the cookie does not expire; any ideas on how this may be accomplished?
2. Are there any resources that detail the format of the `.appcfg_cookies` file, including the encoding?
3. Another approach I am looking into is the use of the `--passin` argument. Are there any resources on this?

Thanks in advance.