welcome: successful registration page (#82)

diff --git a/core/installer/cmd/welcome.go b/core/installer/cmd/welcome.go
index 41d27f7..b1f3259 100644
--- a/core/installer/cmd/welcome.go
+++ b/core/installer/cmd/welcome.go
@@ -1,14 +1,13 @@
 package main
 
 import (
-	"golang.org/x/crypto/ssh"
 	"os"
 
-	"github.com/spf13/cobra"
-
 	"github.com/giolekva/pcloud/core/installer"
 	"github.com/giolekva/pcloud/core/installer/soft"
 	"github.com/giolekva/pcloud/core/installer/welcome"
+	"github.com/spf13/cobra"
+	"golang.org/x/crypto/ssh"
 )
 
 var welcomeFlags struct {
@@ -16,6 +15,7 @@
 	sshKey            string
 	port              int
 	createAccountAddr string
+	loginAddr         string
 }
 
 func welcomeCmd() *cobra.Command {
@@ -47,6 +47,12 @@
 		"",
 		"",
 	)
+	cmd.Flags().StringVar(
+		&welcomeFlags.loginAddr,
+		"login-addr",
+		"",
+		"",
+	)
 	return cmd
 }
 
@@ -76,6 +82,7 @@
 		installer.NewRepoIO(repo, signer),
 		nsCreator,
 		welcomeFlags.createAccountAddr,
+		welcomeFlags.loginAddr,
 	)
 	s.Start()
 	return nil