bzr push to lp without passphrase?

[Tim Michelsen]

Hello,
is there a possibility store the passphrase of the LP longin details
somewhere so that I do not need to enter it at each bzr push?

I did not find any hint on:

Authentication Settings
http://doc.bazaar.canonical.com/bzr.dev/en/user-reference/authentication-help.html

Using Bazaar with Launchpad
http://doc.bazaar.canonical.com/bzr.dev/en/tutorials/using_bazaar_with_launchpad.html

You help would be appreciated.

Thanks in advance,
Timmie