export interface Credentials { password: string; email: string; username?: string; } export interface Token { refresh_token: string; access_token: string; } export interface User { id: number; username: string; email: string; created_date?: Date; } export interface Zone { id: number; name: string; } export interface Flight { id: number, flight_code: string; status: string; origin: string; destination: string; departure_time: string; arrival_time: string; gate: string; }