/**
 * Retrieves a key if it exist in the file system
 * @returns {Promise<string>} A promise w/ the key value
 */
export declare function get(): Promise<string>;
/**
 * Sets a key in the file system
 *
 * @param {string} apiKey The key that should be set
 * @returns {Promise<string>} A promise with the value of the key that was set
 */
export declare function set(apiKey: string): Promise<void>;
/**
 * Clears a key if it exist in the file system
 * @returns {Promise<void>} A promise that resolves to void
 */
export declare function clear(): Promise<void>;