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# WebSecurity - RequireAuthenticatedUser() * * WebSecurity Object](#) * * * ## Definition If the current user is not authenticated, the **RequireAuthenticatedUser()** method sets the HTTP status to 401 (Unauthorized). * * * ## C# and VB Syntax WebSecurity.RequireAuthenticatedUser() * * * ## Parameters None. * * * ## Return Value None. * * * ## Errors and Exceptions In the following cases, any access to the **WebSecurity** object will throw an **InvalidOperationException**: * The **InitializeDatabaseConnection()** method has not been called * **SimpleMembership** is not initialized (or is disabled in the site configuration) * * * ## Remarks The **RequireAuthenticatedUser()** method verifies whether the current user is authenticated. If the current user is not authenticated, the HTTP status is set to 401 (Unauthorized). To verify if the current user is a specific user (by ID or by name), use the **RequireUser()** method. To verify if the user is a member of a role, use the **RequireRoles()** method. * * * ## Technical Data | Name | Value | | --- | --- | | Namespace | WebMatrix.WebData | | Assembly | WebMatrix.WebData.dll | * * WebSecurity Object](#)