/**
 * Decode the token.
 *
 * @param token - The token to decode.
 * @returns The decoded token.
 *
 * @example
 * ```ts
 * import { decodeToken } from 'src/utils';
 *
 * const token = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOjEsImZ1bGxuYW1lIjoiZWxpY2UifQ==';
 * const decodedToken = decodeToken(token); // { userId: 1, fullname: 'elice' }
 * ```
 */
export declare function decodeToken<Token extends Record<string, any> = Record<string, any>>(token: string): Token | null;