Use v2 identity in AuthenticatedClient.
diff --git a/openstack/identity/v2/requests.go b/openstack/identity/v2/requests.go
index 696ee4d..bb068b6 100644
--- a/openstack/identity/v2/requests.go
+++ b/openstack/identity/v2/requests.go
@@ -30,7 +30,7 @@
 		return nil, ErrCredentials
 	}
 
-	url := c.Endpoint + "/tokens"
+	url := c.Endpoint + "tokens"
 	err := perigee.Post(url, perigee.Options{
 		ReqBody: &AuthContainer{
 			Auth: getAuthCredentials(options),
@@ -78,7 +78,7 @@
 func GetExtensions(c *gophercloud.ServiceClient, options gophercloud.AuthOptions) (ExtensionsResult, error) {
 	var exts ExtensionsResult
 
-	url := c.Endpoint + "/extensions"
+	url := c.Endpoint + "extensions"
 	err := perigee.Get(url, perigee.Options{
 		Results: &exts,
 	})