From fe799f30c8352876dfba72260b5d60a04ca05bec Mon Sep 17 00:00:00 2001
From: Alex Ling <hkalexling@gmail.com>
Date: Wed, 3 Jun 2020 08:19:40 +0000
Subject: [PATCH] Make the user listing command handles empty DB

---
 src/mango.cr | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mango.cr b/src/mango.cr
index 19934c4..e2d3d00 100644
--- a/src/mango.cr
+++ b/src/mango.cr
@@ -77,7 +77,7 @@ class CLI < Clim
               password.not_nil!, opts.admin
           when "list"
             users = storage.list_users
-            name_length = users.map(&.[0].size).max
+            name_length = users.map(&.[0].size).max? || 0
             l_cell_width = ["username".size, name_length].max
             r_cell_width = "admin access".size
             header = " #{"username".ljust l_cell_width} | admin access "