diff --git a/api.py b/api.py
index ab25f0a..b14fa52 100644
--- a/api.py
+++ b/api.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 import logging
-import re
 
-from packaging import version
+logging.getLogger(__name__).addHandler(logging.NullHandler())
 
 
 class EjabberdApi:
diff --git a/control.py b/calls.py
similarity index 78%
rename from control.py
rename to calls.py
index f865444..bd6bd0a 100644
--- a/control.py
+++ b/calls.py
@@ -1,14 +1,16 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
-import re
 import logging
+import re
 
 from packaging import version
+
 from api import EjabberdApi
 
-class EjabberdCtl(EjabberdApi):
+log = logging.getLogger(__name__)
 
 
+class EjabberdApiCalls(EjabberdApi):
     @property
     def verstring(self):
         if self._login is not None:
@@ -23,7 +25,7 @@ class EjabberdCtl(EjabberdApi):
                 raise SystemExit(17)
 
             # return parsed version string
-            logging.debug(f"fetch version: {tmp}")
+            log.debug(f"fetched version string: {tmp}")
             return version.parse(tmp)
 
         return None
@@ -75,22 +77,22 @@ class EjabberdCtl(EjabberdApi):
 
     def fetch_registered_count(self, vhost=None):
         if vhost is None:
-            result = self.cmd("stats", {"name":"registeredusers"})
+            result = self.cmd("stats", {"name": "registeredusers"})
             if "stat" in result:
                 return result["stat"]
         else:
-            result = self.cmd("stats_host", {"name":"registeredusers", "host": vhost})
+            result = self.cmd("stats_host", {"name": "registeredusers", "host": vhost})
             if "stat" in result:
                 return result["stat"]
 
     def fetch_muc_count(self, vhost=None, muc_host="conference"):
-         host = "global"
-         if vhost is not None:
-             if self.verstring.major >= 19:
-                 host = '.'.join([muc_host, vhost])
-             else:
-                 host = vhost
-         result = self.cmd("muc_online_rooms", {"host": host})
-         if "rooms" in result:
-             return len(result["rooms"])
-         return len(result)
+        host = "global"
+        if vhost is not None:
+            if self.verstring.major >= 19:
+                host = '.'.join([muc_host, vhost])
+            else:
+                host = vhost
+        result = self.cmd("muc_online_rooms", {"host": host})
+        if "rooms" in result:
+            return len(result["rooms"])
+        return len(result)
diff --git a/cleanup.py b/cleanup.py
index 1654497..f66bea9 100755
--- a/cleanup.py
+++ b/cleanup.py
@@ -3,10 +3,10 @@
 import datetime
 import logging
 
-from control import EjabberdCtl
+from calls import EjabberdApiCalls
 
 
-class EjabberdCleanup(EjabberdCtl):
+class EjabberdCleanup(EjabberdApiCalls):
     def __init__(self, url, login, api):
         super().__init__(url, login, api)
         self.ignore_hosts = []
diff --git a/metrics.py b/metrics.py
index 90d3fc5..bd8a3ea 100755
--- a/metrics.py
+++ b/metrics.py
@@ -2,13 +2,13 @@
 # -*- coding: utf-8 -*-
 import ipaddress
 
-from control import EjabberdCtl
+from calls import EjabberdApiCalls
 
 # rfc6052: IPv6 Addressing of IPv4/IPv6 Translators
 nat64 = ipaddress.ip_network("64:ff9b::/96")
 
 
-class EjabberdMetrics(EjabberdCtl):
+class EjabberdMetrics(EjabberdApiCalls):
     """
     class to fetch metrics per xmlrpc
     """
@@ -190,7 +190,7 @@ class EjabberdMetrics(EjabberdCtl):
 
         return data
 
-    def get_nodes(self):
+    def _get_nodes(self):
         if not hasattr(self, "_nodes"):
             self._nodes = self.fetch_nodes()
         return self._nodes
@@ -224,7 +224,7 @@ class EjabberdMetrics(EjabberdCtl):
         data["vhosts"] = vhosts
         
         nodes = {}
-        for node in self.get_nodes():
+        for node in self._get_nodes():
             nodes[node] = self.get_node_metrics(node)
 
         data["online_client_by_ipversion"] = self.get_online_client_by_ipversion()