# Login & Signup - [Sign in Options](https://guides.noloco.io/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](https://guides.noloco.io/settings/login-and-signup/single-sign-on.md): Integrate your enterprise login service with Noloco - [2FA - Two Factor Authentication](https://guides.noloco.io/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](https://guides.noloco.io/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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://guides.noloco.io/settings/login-and-signup.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.