It's possible to enable the auto-login feature in a Power BI static HTML App using Power BI embedding with Azure Active Directory (AAD) supports authentication. Here's how to go about it.
Register the Application in Azure AD: Begin by registering your application at the Azure Active Directory portal. This registration enables Azure AD to identify and validate your application, making it easier for users to sign in automatically as long as they have already signed into Azure AD.
Configure Power BI Embedded: For this application, consider using Power BI Embedded, a service that enables secure, token-based utilization of Power BI functionality. You can create an embed token for your app that allows access to specific reports and dashboards.
Generate and Pass Access Tokens: Configure your application to automatically request an OAuth access token from Azure Active Directory on the end user's behalf. Because of the use of OAuth 2.0, once the user is signed into Azure Active Directory, there is no immediate need for the user to log in again since no physical user interaction is required each time the service is accessed.
Implement Single Sign-On (SSO): This involves enabling SSO using Azure AD, in which Power BI content is accessible to users who are already logged in to their organizational accounts. Make sure that access tokens are retrieved silently within the authentication flow of your application to avoid repeatedly prompting users for their login details.
With the integration of Power BI Embedded and Azure AD and the use of tokens, your static HTML app can securely perform user autologins, enhancing the user experience. Lastly, adhere to Azure's security guidelines to help manage tokens and protect information from being compromised.