gcloud-*: add pages (#11625)

* gcloud-*: add pages

---------

Signed-off-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Starbeamrainbowlabs <sbrl@starbeamrainbowlabs.com>

pages/common/gcloud-auth.md

@@ -0,0 +1,29 @@
+# gcloud auth
+
+> Grant and revoke authorization to `gcloud` and manage credentials.
+> See also: `gcloud`.
+> More information: <https://cloud.google.com/sdk/gcloud/reference/auth>.
+
+- Authorize Google Cloud access for the `gcloud` CLI with Google Cloud user credentials and set the current account as active:
+
+`gcloud auth login`
+
+- Authorize Google Cloud access similar to `gcloud auth login` but with service account credentials:
+
+`gcloud auth activate-service-account`
+
+- Manage Application Default Credentials (ADC) for Cloud Client Libraries:
+
+`gcloud auth application-default`
+
+- Display a list of Google Cloud accounts currently authenticated on your system:
+
+`gcloud auth list`
+
+- Display the current account's access token:
+
+`gcloud auth print-access-token`
+
+- Remove access credentials for an account:
+
+`gcloud auth revoke`