Editing Dave/workspace/Google login urls

The following is a survey of Google login urls (because I couldn't find it documented).  I'm trying to find the best way to point people to a particular service with a particular account, minimizing possible multi-account confusion.

There is no one answer, but here are some recommendations:

* <code><nowiki>https://</nowiki>drive.google.com/a/<var>domain</var></code>
* <code><nowiki>https://</nowiki>accounts.google.com/AccountChooser?continue=<var>targetURL</var></code>

==accounts.gooogle.com==

{| class="wikitable"
|+ Google (not apps)
! rowspan="2" | url
! colspan="3" | Accounts logged in
! rowspan="2" | notes
|-
! none !! one !! both
|-
| https://accounts.google.com/ServiceLogin
| standard blank login
| Password prompt (with option to "Sign in with a different account")
| Password prompt, for account logged in longest
| From any Google service, is the url forwarded to or provided by the "Sign in" button.
|-
| https://accounts.google.com/AccountChooser
| Forwards to "ServiceLogin"
| "Choose an account" dialog, with account listed and "Add account" option
| "Choose an account" dialog, with account'''''s''''' listed and "Add account" option
| Target of standard login page "Sign in with a different account" option
|-
| https://accounts.google.com/AddSession
| Forwards to "ServiceLogin"
| standard blank login
| standard blank login
| Target of "Add account" option on standard "AccountChooser" page
|}

To '''go to a particular Google service after loggin in''', just add the "continue" parameter with a url encoded target url.

==Google Apps==

Can we gain usability be using Google App urls? Google App urls are often Google service urls with "<code>/a/<var>domain</var></code>" after the domain (e.g. <code><nowiki>https://</nowiki>drive.google.com/a/example.org</code>). What's a survey of those look like?

{| class="wikitable"
|+ Google Apps
! rowspan="2" | url
! colspan="3" | Accounts logged in
|-
! none !! other !! both
|-
| <nowiki>https://</nowiki>www.google.com/a/<var>domain</var>/ServiceLogin
| Domain login
| Domain login
| Standard password prompt prepopulated with domain account (forwards to <code><nowiki>https://</nowiki>accounts.google.com/ServiceLogin?authuser=<var>sessionNumber</var></code>)
|-
| <nowiki>https://</nowiki>www.google.com/a/<var>domain</var>/AccountChooser
| Regular login
| Regular AccountChooser
Choosing a non-domain account does nothing (returns to original AccountChooser unchanged).
Choosing "Add account" forwards to AddSession
| Forwards to Admin for domain (UserHub)
|-
| <nowiki>https://</nowiki>www.google.com/a/<var>domain</var>/AddSession
| Regular login
| Regular AccountChooser
Choosing a non-domain account does nothing (returns to original AccountChooser unchanged).
Choosing "Add account" forwards to AddSession
| Forwards to Admin for domain (UserHub)
|-
| <nowiki>https://</nowiki>admin.google.com/a/<var>domain</var>
| Regular login
| Regular AccountChooser
| Admin for domain
|-
| <nowiki>https://</nowiki>drive.google.com/a/<var>domain</var>
| Domain login
| Old style account chooser (<code><nowiki>https://</nowiki>www.google.com/a/SelectSession</code>)
| Drive for domain
|-
| <nowiki>https://</nowiki>groups.google.com/a/<var>domain</var>
| Groups for domain (though not branded)
| Groups for domain
| Groups for domain, but with practically random account
|}

The following don't work:
* www and naked forward to admin
* accounts forwards to Apps marketing page