Firebase Functions - interfaces and enums

interface IUserWallet
{
    experience: number;
    moneyGreen: number;
    moneyGold: number;
    moneyRed: number;
}

interface IUserStats
{
    soldWithProfit: number;
    spentMoneyGreen: number;
    spentMoneyGold: number;
    spentMoneyRed: number;
    registerDate: number;
    totalDonations: number;
    userLevel: number;
    biggestProfit: number;
}

interface IUserSettings
{
    clanId: number;
    //clanMembership: ClanMembership;
    displayName: string;
    premiumActive: boolean;
    userId: string;
    //language: Language;
}

enum ClanMembership
{
    Founder,
    Owner,
    ManagementBoard,
    Member,
    None,
}

enum Language
{
    English,
    Polish,
}