Make Authenticate issue an HTTP request
diff --git a/errors.go b/errors.go
index 53397e1..079f0ae 100644
--- a/errors.go
+++ b/errors.go
@@ -7,3 +7,4 @@
 var ErrNotImplemented = fmt.Errorf("Not implemented")
 var ErrProvider = fmt.Errorf("Missing or incorrect provider")
 var ErrCredentials = fmt.Errorf("Missing or incomplete credentials")
+var ErrConfiguration = fmt.Errorf("Missing or incomplete configuration")