Adding TypeDoc comments for Auth methods. (#530)

* Adding commenting for Admin and Storage.

* Addressing feedback from hiranya911.

* Adding commenting for admin.Messaging and others.

* Fixing some issues found by hiranya911.

* Adding correct indenting in line 1909.

* Adding commmenting for admin.Auth classes and fleshing out TOC.

* Making fixes requeted by bojeil-google.

* Fixing one last alignment issue.

* Adding comments for Auth methods.

* Addressing feedback from bojeil-goole.

* Second attempt to view and address *all* comments from bojeil-google.

* Removing unnecessary whitespace.

* Fixing what we think and hope is the last typo in this pull request.

Author: egilmorez

docgen/content-sources/node/toc.yaml

@@ -41,7 +41,7 @@ toc:
   - title: "SAMLAuthProviderConfig"
     path: /docs/reference/admin/node/admin.auth.SAMLAuthProviderConfig
   - title: "SAMLUpdateAuthProviderRequest"
-    path: /docs/reference/admin/node/admin.auth.SAMLUpdateAuthProviderRequests
+    path: /docs/reference/admin/node/admin.auth.SAMLUpdateAuthProviderRequest
   - title: "UpdateRequest"
     path: /docs/reference/admin/node/admin.auth.UpdateRequest
   - title: "UserImportOptions"