### Answer Building a custom login UI in Angular requires using ZITADEL's Session API, which needs a backend component—a purely client-side SPA approach is not recommended. [(1) ]() [(2) ]() **Why a backend is required:** - The Session API requires authentication with a service user token. [(3) ]() [(4) ]() - Secrets cannot be safely protected in a client-side SPA. [(2) ]() **Recommended architecture:** - Use a Backend-for-Frontend (BFF) pattern or a microservice layer (e.g., NestJS) to interact with ZITADEL's Session API securely. - Your Angular frontend communicates with your backend, which then calls ZITADEL APIs using protected credentials. **Key resources for building a custom login UI:** - [Handle External Logins in a Custom Login UI]() [(5) ]() - [Multi-Factor Authentication (MFA) in a Custom Login UI]() [(6) ]() - [Build your own Login UI guide]() [(1) ]() ZITADEL is also building a new login UI using Next.js with the Session APIs, which you can reference: [) [(7) ]() **Note on OIDC compliance:** If you need OIDC-compliant tokens (id_token, access_token) , you'll also need to im

How can I implement my own login UI in Angular?

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