I need my Resen account fully connected to a custom Web application so the two work together seamlessly. Scope of work • Activate and configure Resen’s user authentication so visitors can sign up, log in, and manage sessions through Resen without breaking our existing flow. • Enable reliable two-way data synchronisation between the app’s database and Resen, making sure records stay in sync even when edits happen on either side. • Integrate the required Resen APIs and expose them inside the app (REST hooks, web-hooks, or SDK methods—whichever you find most robust). Deliverables 1. Updated configuration files, environment variables, and any middleware needed for the above features. 2. Clear step-by-step documentation so I can replicate the setup in staging and production. 3. A quick hand-off call or screen-share to walk me through the changes. Tech stack: the app is a standard Web build (Node.js back-end with a React front-end). If you prefer other tooling for the interface layer, let me know—Resen compatibility is the priority. I’m after a clean, maintainable solution with minimal downtime, so please let me know how soon you can start and what you’ll need from my side (API keys, server access, etc.).