diff --git a/authenticate.go b/authenticate.go
new file mode 100644
index 0000000..19fabf6
--- /dev/null
+++ b/authenticate.go
@@ -0,0 +1,13 @@
+package gophercloud
+
+import (
+	"fmt"
+)
+
+type AuthOptions struct {
+	Username, Password, TenantId string
+}
+
+func Authenticate(provider string, options AuthOptions) (*int, error) {
+	return nil, fmt.Errorf("Not implemented.")
+}