public override async Task ValidateLogoutRequest([NotNull] ValidateLogoutRequestContext context) { // If an optional post_logout_redirect_uri was provided, validate it. if (!string.IsNullOrEmpty(context.PostLogoutRedirectUri)) { var application = await Applications.FindByLogoutRedirectUri(context.PostLogoutRedirectUri, context.HttpContext.RequestAborted); if (application == null) { Logger.LogError("The logout request was rejected because the client application corresponding " + "to the specified post_logout_redirect_uri was not found in the database: " + "'{PostLogoutRedirectUri}'.", context.PostLogoutRedirectUri); context.Reject( error: OpenIdConnectConstants.Errors.InvalidClient, description: "Invalid post_logout_redirect_uri."); return; } } context.Validate(); }