const connection: DatabaseConnection = new DatabaseConnection({
    hostname: '...',
    user: '...',
    password: '...',
    database: '...'
});

@ModelClass('account', connection)
class Account extends Model {

    public async getUsername(): Promise<string> {
        return this.get<string>('username');
    }

    public setUsername(username: string): void {
        return this.set('username', username);
    }

}

const account: Account = new Account({
    username: 'johndoe'
});
await account.save();

const account: Account = await Account
    .findOne()
    .where('username').isLike('johndoe')
    .exec();
console.log('We found: ' + await account.getUsername());