check _region existence

Author: rchotacode

prowler/providers/oraclecloud/oraclecloud_provider.py

@@ -161,10 +161,12 @@ def __init__(
 
         # Get regions
         self._regions = self.get_regions_to_audit(region)
-        self._home_region = next(
-            (region.key for region in self._regions if region.is_home_region),
-            self._regions[0].key,
-        )
+        self._home_region = None
+        if self._regions:
+            self._home_region = next(
+                (region.key for region in self._regions if region.is_home_region),
+                self._regions[0].key,
+            )
         logger.info(f"Home region is: {self._home_region}")
 
         # Get compartments