import { DebugLevel } from "../enums/debug-level.enum";
export declare class SecurePay {
    /** Variables */
    private clientId;
    private clientSecret;
    private sandbox;
    private debugLevel;
    /** Services */
    private _auth;
    constructor(options: {
        clientId: string;
        clientSecret: string;
        sandbox?: boolean;
        debugLevel?: DebugLevel;
    });
    /**
     * Set / Update Credential
     *
     * @param {string} clientId
     * @param {string} clientSecret
     */
    setCredential(clientId: string, clientSecret: string): "" | Promise<string>;
}