diff --git a/spaceapi/auth.py b/spaceapi/auth.py
--- a/spaceapi/auth.py
+++ b/spaceapi/auth.py
@@ -3,8 +3,9 @@ from flask.ext.httpauth import HTTPDiges
 
 httpauth = HTTPDigestAuth()
 
+
 @httpauth.get_password
 def get_pw(username):
-    if username is in current_app.config['HTTP_DIGEST_AUTH_USERS']:
+    if username in current_app.config['HTTP_DIGEST_AUTH_USERS']:
         return current_app.config['HTTP_DIGEST_AUTH_USERS'][username]
     return None