How to use the ts-express-decorators.JsonProperty function in ts-express-decorators

lastName: string;

    @prop()
    @JsonProperty()
    password?: string;

    @prop()
    @JsonProperty()
    picture?: string;

    // Providers data
    @prop() facebook?: string;
    @arrayProp({ items: AuthToken }) tokens?: AuthToken[];

    @prop()
    @JsonProperty({
        use: String
    })
    get fullName() {
        return `${this.firstName} ${this.lastName}`;
    }

    @instanceMethod
    matchPassword(candidatePassword: string) {
        return new Promise((resolve) => {
            bcrypt.compare(String(candidatePassword), this.password, (err, isMatch) => {
                if (err || !isMatch) return resolve(false);

                resolve(true);
            });
        });
    }