Model Classes

public class PlayerModel { // Base Model of other models

    @DBSync
    public String uuid;
    @DBSync
    public String username;
    @DBSync
    public String originalName;
    @DBSync
    public List<UsernameModel> names;

}

public class FriendModel extends PlayerModel { // The root document structure of the database document

    @DBSync
    public List<UserModel> followers;

}

public class UserModel extends PlayerModel { // user model, currently empty, but has player's fields

}

public class UsernameModel { // username model, used in PlayerModel

    @DBSync public String name;
    @DBSync public long changedToAt;

}