import { type Credentials } from './credentials';
type TokenResponse = {
    errcode: number;
    errmsg: string;
    access_token: string;
    expires_in: number;
};
/**
 * 获取企业内部应用的身份凭证
 *
 * @see https://open.dingtalk.com/document/orgapp/obtain-the-access_token-of-an-internal-app
 */
export declare class SessionCredentials {
    #private;
    protected credentials: Credentials;
    constructor(credentials: Credentials);
    getAccessToken(): Promise<string>;
    protected process(): Promise<TokenResponse>;
    protected request(): Promise<TokenResponse>;
}
export {};