/**
 * Generates a JWT for Epic's FHIR integration.
 * @param clientId - The client ID for the app.
 * @param tokenEndpoint - The FHIR authorization server's token endpoint URL.
 * @param privateKey - The private key to sign the JWT.
 * @returns The signed JWT.
 */
export declare const generateJWT: (clientId: string, tokenEndpoint: string, privateKey: string) => string;
