--- title: Authentication description: Learn how authentication works in Reactiv, including login options, customer accounts, and session behavior in your app. --- [Skip to content](https://info.reactiv.ai/reactiv-help-center/authentication-reactiv-support-center#main-content) ![logo-mono-light](https://info.reactiv.ai/hubfs/logo-mono-light.svg) Open main navigation Close main navigation - [Contact us](https://info.reactiv.ai/reactiv-help-center/how-do-i-contact-customer-support-reactiv-support-center) [Contact us](https://info.reactiv.ai/reactiv-help-center/how-do-i-contact-customer-support-reactiv-support-center?hsLang=en-ca) Answers, documented. - There are no suggestions because the search field is empty. 1. [Reactiv Help Center](https://info.reactiv.ai/reactiv-help-center?hsLang=en-ca) 2. [Building Your App](https://info.reactiv.ai/reactiv-help-center/building-your-app?hsLang=en-ca) 3. [App Settings](https://info.reactiv.ai/reactiv-help-center/building-your-app?hsLang=en-ca#app-settings) February 18, 2026 # Authentication ## Let customers log into your app using Shopify’s Customer Accounts for a seamless, modern authentication experience. ![](https://info.reactiv.ai/hs-fs/hubfs/Knowledge%20Base%20Import/Screenshot_2025-10-07_at_12.09.53%E2%80%AFPM-1759857005-Feb-13-2026-07-12-58-5207-PM.png?width=40&height=40&name=Screenshot_2025-10-07_at_12.09.53%E2%80%AFPM-1759857005-Feb-13-2026-07-12-58-5207-PM.png) Written by Reactiv App ### **How to Access Customer Settings** 1. Log in to your **Shopify admin dashboard**. 2. In the left-hand sidebar, scroll to the **Sales Channels** section. 3. Click **Reactiv – Mobile App Builder**, then select **App Studio**. 4. Click your **company logo** at the top of the page and select **App Settings**. 5. From the top menu, click **Customer** ### **Use Customer Accounts** This feature lets you switch from **legacy customer accounts** to the newer **Shopify Customer Accounts** with headless support. This is recommended for merchants who want a modern and secure login flow tied to Shopify’s customer management tools. ### **What you’ll need:** - A **headless sales channel** set up in Shopify. See [here](https://info.reactiv.ai/reactiv-help-center/migrating-to-customer-accounts-in-your-shopify-store-reactiv-support-center?hsLang=en-ca) if not yet setup. - A valid **Client ID** from Shopify. - A **Callback URI** (provided by Reactiv) to handle the authentication response. [![](https://info.reactiv.ai/hubfs/Knowledge%20Base%20Import/535717752-84eabe3c-7ce7-4374-931f-dea24be177be.png)](https://downloads.intercomcdn.com/i/o/zgqq9fe6/1963300088/15eee68afb2cad6cd13f51c0e81f/535717752-84eabe3c-7ce7-4374-931f-dea24be177be.png?expires=1771011900&signature=98b2aef4ae9d466ec252e5b768b9fdafe8b8afa1a02a2877cd536a0a4e80a6cc&req=dSkhFcp%2BnYFXUfMW1HO4zWwrIfZPOixImcEiQoKUT9OXfCeM0587mltJddS4%0A1NhDcV9TF%2BouWc%2F0B5Q%3D%0A) --- ### **Fields** - **Client ID** ​ Enter the Client ID associated with your Shopify headless channel. This connects your app to the Shopify customer account system. - **Callback URI** ​ This URI is used to redirect users back to your app after login. Reactiv will auto-generate this for you. Make sure it's whitelisted in your Shopify headless setup. 💡 **Tip: Where to find your Client ID and manage Callback URIs** - You can find your **Client ID** in your **Shopify Admin** under **Settings \> Apps and sales channels \> Develop apps**. - Select your custom app (used for the headless channel), then go to the **API credentials** tab to copy the **Client ID** (also labeled as API key). - For the **Callback URI**, Reactiv generates this for you automatically. If you don’t see these options, double-check that your store has the **Shopify Headless channel** set up and a custom app created. --- ### **Toggle On/Off** Use the toggle in the top-right corner to enable or disable customer account authentication. 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