make SMTP username and password non required

app/views/email_smtp_settings/index.html.erb

@@ -18,11 +18,11 @@
         <div class="grid md:grid-cols-2 gap-4">
           <div class="form-control">
             <%= ff.label :username, class: 'label' %>
-            <%= ff.text_field :username, value: value['username'], required: true, class: 'base-input' %>
+            <%= ff.text_field :username, value: value['username'], class: 'base-input' %>
           </div>
           <div class="form-control">
             <%= ff.label :password, class: 'label' %>
-            <%= ff.password_field :password, value: value['password'], required: true, class: 'base-input' %>
+            <%= ff.password_field :password, value: value['password'], class: 'base-input' %>
           </div>
         </div>
         <div class="grid md:grid-cols-2 gap-4">