You are developing an app that uses Common Data Service. You must integrate Common Data Service with a new web application. You must allow the new web application to display data from Common Data Service. You build a single-page web application using the Web API. You need to authenticate your app using OAuth. What should you use?
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OAuth requires an identity provider for authentication. For Dataverse, the identity provider is Azure Active Directory (AAD). To authenticate with AAD using a Microsoft work or school account, use the Azure Active Directory Authentication Libraries (ADAL) or Microsoft Authentication Library (MSAL). https://docs.microsoft.com/en-us/powerapps/developer/data-platform/authenticate-oauth