Add prod env var test

Author: Fireye04

src/sasquatchbackpack/sources/usgs/commands.py

@@ -1,5 +1,6 @@
 """USGS CLI."""
 
+import os
 from datetime import UTC, datetime, timedelta
 
 import click
@@ -229,3 +230,9 @@ def usgs_earthquake_data(
             "All entries missing from this list "
             "have been identified as already present in Kafka."
         )
+        click.echo(
+            os.getenv(
+                "SASQUATCH_REST_PROXY_URL",
+                "no env var :(",
+            )
+        )