diff --git a/otpauth/models.py b/otpauth/models.py
index de2ad3e..6e1898e 100644
--- a/otpauth/models.py
+++ b/otpauth/models.py
@@ -2,6 +2,10 @@ from django.db import models
 from django.contrib.auth.models import AbstractUser
 from rest_framework import exceptions
 from rest_framework import authentication
+import json
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 class OTPSeed(AbstractUser):
@@ -27,17 +31,20 @@ from otpauth.serializer import TokenSerializer
 
 class OTPAuthentication(authentication.BaseAuthentication):
     def authenticate(self, request):
+        logger.debug("in authenticate {}".format(json.dumps(request.data)))
         serializer = TokenSerializer(data=request.data)
 
         if serializer.is_valid():
             instance, token = serializer.save()
         else:
+            logger.error("serializer is invalid")
             raise exceptions.AuthenticationFailed()
 
         # not dealing with admin realm -> can only be auth [see serializer]
         if not instance.realm == "ungleich-admin":
             if not request.path == "/ungleichotp/verify/":
+                logger.debug("request.path is not /ungleichotp/verify/")
                 raise exceptions.AuthenticationFailed()
 
-        # print("AUTH DONE: {} - {}".format(request.path, instance))
+        logger.debug("AUTH DONE: {} - {}".format(request.path, instance))
         return (instance, token)