Kamalogam User Name ⇒ < RELIABLE >

const checkAvailability = debounce(async (value) => , 500);

POST /api/check-username "username": "john_doe" kamalogam user name

"available": true

// 3. Check availability const existing = await db.query( 'SELECT 1 FROM kamalogam_users WHERE LOWER(username) = $1', [username.toLowerCase()] ); const checkAvailability = debounce(async (value) =&gt

useEffect(() => checkAvailability(username); , [username]); if (existing.rows.length &gt

if (existing.rows.length > 0) return res.json( available: false, reason: 'Username already taken.' );