Added a heredoc to get-token.

get-token.py

@@ -1,4 +1,19 @@
 #!/usr/bin/env python3
+"""
+Get an Azure DevOps token and print it in a format suitable for exporting as an environment variable.
+
+Usage:
+    eval $(python get-token.py)
+
+    or
+
+    python get-token.py > set-ado-token.sh
+    source set-ado-token.sh
+
+    Now you can use the ADO_TOKEN environment variable, for example using curl:
+
+    curl -H "Authorization: Bearer $ADO_TOKEN" https://dev.azure.com/your_organization/_apis/projects?api-version=7.1
+"""
 
 from sk.azure import get_token