import { AuthService, BackstageCredentials, BackstageServicePrincipal, BackstageNonePrincipal, BackstageUserPrincipal } from '@backstage/backend-plugin-api';
export declare function createCredentialsWithServicePrincipal(sub: string, token?: string): InternalBackstageCredentials<BackstageServicePrincipal>;
export declare function createCredentialsWithUserPrincipal(sub: string, token: string, expiresAt?: Date): InternalBackstageCredentials<BackstageUserPrincipal>;
export declare function createCredentialsWithNonePrincipal(): InternalBackstageCredentials<BackstageNonePrincipal>;
export declare function toInternalBackstageCredentials(credentials: BackstageCredentials): InternalBackstageCredentials<BackstageUserPrincipal | BackstageServicePrincipal | BackstageNonePrincipal>;
/** @public */
export declare const authServiceFactory: () => import("@backstage/backend-plugin-api").ServiceFactory<AuthService, "plugin">;