diff --git a/lib/auth.js b/lib/auth.js
new file mode 100644
index 0000000..16fe02d
--- /dev/null
+++ b/lib/auth.js
@@ -0,0 +1,12 @@
+exports.getCookie = function(opts, cb){
+    var db = nano(opts.db.url);
+    nano.auth(opts.username, opts.password, function(err, body, headers){
+        if(err){
+            cb(err);
+        }else{
+            if(headers && headers['set-cookie']){
+                cb(null, headers['set-cookie']);
+            }
+        }
+    });
+}
\ No newline at end of file