export declare const DefaultSignInPage: import("@backstage/frontend-plugin-api").ExtensionDefinition<{
    kind: "sign-in-page";
    name: undefined;
    config: {};
    configInput: {};
    output: import("@backstage/frontend-plugin-api").ConfigurableExtensionDataRef<import("react").ComponentType<import("@backstage/core-plugin-api").SignInPageProps>, "core.sign-in-page.component", {}>;
    inputs: {};
    params: {
        loader: () => Promise<import("react").ComponentType<import("@backstage/core-plugin-api").SignInPageProps>>;
    };
}>;