/**
 * Decodes a JWT token and extracts environment and tenant information.
 *
 * @param token - The JWT token to decode
 * @returns Object containing environment, tenant, accessToken, and expiresAt
 * @throws Error if token format is invalid or cannot be decoded
 */
export declare function decodeToken(token: string): {
    accessToken: string;
    environment: string;
    expiresAt: number | undefined;
    tenant: string;
};