fix: fixed required password

pages/adminkursus/edit/[id].jsx

@@ -18,7 +18,7 @@ const Edit = () => {
     }
     const body = JSON.stringify({
       username,
-      password
+      password: password || undefined
     })
     const updateQuery = await fetch("https://rpl-backend-production.up.railway.app/v1/adminkursus/update/" + router.query.id, {
       method: "PATCH",
@@ -79,6 +79,7 @@ const Edit = () => {
           handleUpdate()
           return;
         }}>
+
           <div className="flex flex-row align-middle justify-between">
             <span className="h-min my-auto font-bold text-lg">user_id</span>
             <input disabled value={user_id} type="tel" required className="drop-shadow-xl w-2/3 p-2 rounded-xl" />