Fix info in authentication.

docs/users/authentication.qmd

@@ -2,31 +2,28 @@
 title: User Authentication
 ---
 
-UC Berkeley uses a [Canvas](https://www.instructure.com/canvas/) instance,
-called [bcourses.berkeley.edu](https://bcourses.berkeley.edu). Almost
-all our hubs use this for authentication, although [not all yet](https://github.com/berkeley-dsep-infra/datahub/issues/1574).
+Most of our hubs use a [Canvas](https://www.instructure.com/canvas/) instance,
+[bcourses.berkeley.edu](https://bcourses.berkeley.edu), for authentication. The hubs not using `CanvasOAuthenticator` are edx (`LTI1Authenticator`), highschool (`GoogleOAuthenticator`), and workshop (`dummy`).
 
-## Who has access?
+## Authorization
 
-Anyone who can log in to bcourses can log into our JupyterHubs. This
-includes all berkeley affiliates. If you have a working berkeley.edu
-email account, you can most likely log in to bcourses, and hence to
+Anyone who can log in to bCourses can log into our Canvas-based hubs. This
+includes all Berkeley affiliates. If you have a working berkeley.edu
+email account, you can most likely log in to bCourses, and hence to
 our JupyterHubs.
 
 Students have access for 9 months after they graduate. If they have
 an incomplete, they have 13 months of access instead.
 
-## Non-berkeley affiliates
+## Non-Berkeley affiliates
 
 If someone who doesn't have a berkeley.edu account wants to use
-the JupyterHubs, they need to get a [CalNet Sponsored Guest
-account](https://calnetweb.berkeley.edu/calnet-departments/calnet-sponsored-guests)
-This gives people access to [bcourses](https://bcourses.berkeley.edu),
-and hence to all the JupyterHubs.
+the JupyterHubs, they need to obtain a [CalNet Sponsored Guest
+account](https://calnetweb.berkeley.edu/calnet-departments/calnet-sponsored-guests) and get added to a bCourses course.
 
 ## Troubleshooting
 
-If you can log in to [bcourses](https://bcourses.berkeley.edu) but
+If you can log in to [bCourses](https://bcourses.berkeley.edu) but
 not to any of the JupyterHubs, please contact us.
 
-If you can not log in to bcourses, please [contact bcourses support](https://dls.berkeley.edu/services/bcourses-0)
+If you can not log in to bCourses, please [contact bCourses support](https://dls.berkeley.edu/services/bcourses-0).