# Login & Signup

- [Sign in Options](/settings/login-and-signup/sign-in-options.md): Control how your users sign in (or sign up) to your app from the User Lists & Sign-up settings
- [Single Sign On](/settings/login-and-signup/single-sign-on.md): Integrate your enterprise login service with Noloco
- [2FA - Two Factor Authentication](/settings/login-and-signup/2fa-two-factor-authentication.md): You can add an additional layer of protection and security to your Noloco App by enabling 2FA (Two Factor Authentication) in the Sign in Options
- [Client Portal User Add-On](/settings/login-and-signup/client-portal-user-add-on.md): Easily manage and control costs associated with external users accessing their app, such as clients, customers, partners, contractors, and freelancers.