createNewUser(email: string, username: string, password: string) {
        const httpOptions = {
            headers: new HttpHeaders({
                'Content-Type': 'application/json'
            })
        };

        const body = {
            id: Math.random(),
            nickname: username,
            email: email,
            password: password
        };

        this.http
            .post(this.baseUrl + '/userEntities', body, httpOptions)
            .subscribe();
    }