fix instance

mongo/datadog_checks/mongo/config.py

@@ -102,7 +102,7 @@ def __init__(self, instance, log):
         self.dbm_enabled = is_affirmative(instance.get('dbm', False))
         self.database_instance_collection_interval = instance.get('database_instance_collection_interval', 300)
         self.cluster_name = instance.get('cluster_name', None)
-        self.cloud_metadata = self._compute_cloud_metadata()
+        self.cloud_metadata = self._compute_cloud_metadata(instance)
         self._operation_samples_config = instance.get('operation_samples', {})
         self._slow_operations_config = instance.get('slow_operations', {})
         self._schemas_config = instance.get('schemas', {})
@@ -159,9 +159,9 @@ def _compute_metric_tags(self):
             tags.append('clustername:%s' % self.cluster_name)
         return tags
 
-    def _compute_cloud_metadata(self):
+    def _compute_cloud_metadata(self, instance):
         cloud_metadata = {}
-        if aws := self.instance.get('aws'):
+        if aws := instance.get('aws'):
             cloud_metadata['aws'] = {
                 'instance_endpoint': aws.get('instance_endpoint'),
                 'cluster_identifier': aws.get('cluster_identifier') or self.cluster_name,