Update docs for sharing

docs/commercial/sharing.rst

@@ -2,30 +2,42 @@ Sharing
 -------
 
 .. note::
-    This feature only exists on `Read the Docs for Business <https://readthedocs.com/>`_.
 
-You can share your project with users outside of your company.
-There are two ways to do this:
+   This feature only exists on `Read the Docs for Business <https://readthedocs.com/>`__.
+
+You can share your project with users outside of your company:
 
 * by sending them a *secret link*,
 * by giving them a *password*.
 
 These methods will allow them to view a specific project inside your company.
 
+Additionally, you can use a HTTP Authorization Header.
+This is useful to have access from a script.
+
 Enabling
 ~~~~~~~~
 
 * Go into your *Project Admin* page and to the *Sharing* menu.
-* Under the *Share with someone new* heading, select the way you prefer (secret link or password), add an expiration date and a *Description* so you remember who you're sharing it with.
+* Under the *Share with someone new* heading, select the way you prefer (secret link, password, or HTTP header token),
+  add an expiration date and a *Description* so you remember who you're sharing it with.
 * Click *Share!* to create.
 * Get the info needed to share your documentation with other users:
 
   * If you have selected secret link, copy the link that is generated
   * In case of password, copy the link and password
+  * For HTTP header token, you need to pass the ``Authorization`` header in your HTTP request.
 
 * Give that information to the person who you want to give access.
 
-.. note:: You can always revoke access in the same panel.
+.. note::
+
+   You can always revoke access in the same panel.
+
+.. note::
+
+   Sharing using a password and a HTTP header token are currently in beta.
+   If you want access to these features, email us to [email protected].
 
 Effects
 ~~~~~~~
@@ -40,6 +52,17 @@ Password
 ********
 
 Once the person you send the link to clicks on the link, they will see
-a *Authorization required* page asking them for the password you
+an *Authorization required* page asking them for the password you
 generated. When the user enters the password, they will have access to
 view your project.
+
+HTTP Authorization Header
+*************************
+
+You need to send the ``Authorization`` header with the token on each HTTP request.
+The header has the form ``Authorization: Token <ACCESS_TOKEN>``.
+For example:
+
+.. prompt:: bash $
+
+   curl -H "Authorization: Token 19okmz5k0i6yk17jp70jlnv91v" https://docs.example.com/en/latest/example.html