Merge pull request #105 from Azure-Samples/mention-ciam

Mention how to use a CIAM tenant

Author: rayluo

.env.sample

@@ -4,7 +4,13 @@
 CLIENT_ID=<client id>
 CLIENT_SECRET=<client secret>
 
-# Expects a full authority URL such as "https://login.microsoftonline.com/TENANT_GUID"
-# or "https://login.microsoftonline.com/contoso.onmicrosoft.com".
+# The AUTHORITY variable expects a full authority URL.
+#
+# If you are using an AAD tenent, configure it as
+# "https://login.microsoftonline.com/TENANT_GUID"
+# or "https://login.microsoftonline.com/subdomain.onmicrosoft.com".
+#
+# If you are using a CIAM tenant, configure it as "https://subdomain.ciamlogin.com"
+#
 # Alternatively, leave it undefined if you are building a multi-tenant app in world-wide cloud
 #AUTHORITY=<authority url>