Copy/pasta over login from the base theme

lumbung.space/login/code.ftl

@@ -0,0 +1,19 @@
+<#import "template.ftl" as layout>
+<@layout.registrationLayout; section>
+    <#if section = "header">
+        <#if code.success>
+            ${msg("codeSuccessTitle")}
+        <#else>
+            ${msg("codeErrorTitle", code.error)}
+        </#if>
+    <#elseif section = "form">
+        <div id="kc-code">
+            <#if code.success>
+                <p>${msg("copyCodeInstruction")}</p>
+                <input id="code" class="${properties.kcTextareaClass!}" value="${code.code}"/>
+            <#else>
+                <p id="error">${code.error}</p>
+            </#if>
+        </div>
+    </#if>
+</@layout.registrationLayout>