diff --git a/vulnwhisp/frameworks/nessus.py b/vulnwhisp/frameworks/nessus.py
index 3a56726..9be8103 100755
--- a/vulnwhisp/frameworks/nessus.py
+++ b/vulnwhisp/frameworks/nessus.py
@@ -46,8 +46,8 @@ class NessusAPI(object):
         self.logger = logging.getLogger('NessusAPI')
         if verbose:
             self.logger.setLevel(logging.DEBUG)
-        if username is None or password is None:
-            raise Exception('ERROR: Missing username or password.')
+        if not all((username, password)) and not all((access_key, secret_key)):
+            raise Exception('ERROR: Missing username, password or API keys.')
 
         self.user = username
         self.password = password
diff --git a/vulnwhisp/vulnwhisp.py b/vulnwhisp/vulnwhisp.py
index d15bc03..1e2b827 100755
--- a/vulnwhisp/vulnwhisp.py
+++ b/vulnwhisp/vulnwhisp.py
@@ -58,8 +58,12 @@ class vulnWhispererBase(object):
             except:
                 self.enabled = False
             self.hostname = self.config.get(self.CONFIG_SECTION, 'hostname')
-            self.username = self.config.get(self.CONFIG_SECTION, 'username')
-            self.password = self.config.get(self.CONFIG_SECTION, 'password')
+            try:
+                self.username = self.config.get(self.CONFIG_SECTION, 'username')
+                self.password = self.config.get(self.CONFIG_SECTION, 'password')
+            except:
+                self.username = None
+                self.password = None 
             self.write_path = self.config.get(self.CONFIG_SECTION, 'write_path')
             self.db_path = self.config.get(self.CONFIG_SECTION, 'db_path')
             self.verbose = self.config.getbool(self.CONFIG_SECTION, 'verbose')