import { DyNTS_DataService } from '../../../_services/base/data.service';
import { DyNTS_Default_User } from '../_models/default-user.data-model';
/**
 * Default User Data Service
 * Handles CRUD operations for default users
 */
export declare class DyNTS_Default_User_DataService extends DyNTS_DataService<DyNTS_Default_User> {
    constructor(set: {
        user?: DyNTS_Default_User;
        issuer: string;
    });
    /**
     * Find user by username
     */
    findByUsername(username: string): Promise<DyNTS_Default_User | null>;
    /**
     * Find user by email
     */
    findByEmail(email: string): Promise<DyNTS_Default_User | null>;
    /**
     * Update last login timestamp
     */
    updateLastLogin(userId: string): Promise<void>;
}
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