export interface GoogleKeyJson {
    type: string;
    project_id: string;
    private_key_id: string;
    private_key: string;
    client_email: string;
    client_id: string;
    auth_uri: string;
    token_uri: string;
    auth_provider_x509_cert_url: string;
    client_x509_cert_url: string;
}
export declare function authenticate(scopes?: string | string[]): Promise<import("google-auth-library").Credentials>;
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