documentation for config updater

[dmilisic]

Hi,

I found this module very useful for my usecase. However, I had issue with Authorization header not being updated. It had been sending the same header again and again. The code (after token refresh) was the following:

$http.defaults.headers.common['Authorization'] = 'Token token="' + newToken + '"';
authService.loginConfirmed();

but that didn't update the Authorization header for retried requests. After digging around for a couple of hours, I found out that the loginConfirmed method had second argument named configUpdater. I solved the problem by using it:

$http.defaults.headers.common['Authorization'] = 'Token token="' + newToken + '"';
authService.loginConfirmed(null, function(config) {
    config.headers['Authorization'] = 'Token token="' + newToken + '"';
    return config;
});

I hope this could save someone else's time, and it would be great if you could add some documentation for configUpdater.

Thanks,
Danijel

[simison]

@witoldsz can be closed now that #56 is in?