@app.route('/login',methods=['GET'])
def login():
    return render_template('login.html')

@app.route('/logina',methods=['POST'])
def logina():
    uLogin = request.form['login']
    uPassword = request.form['password']
    with open('database.json') as db:
        user_data = json.loads(db)

    if uLogin in user_data and user_data[uLogin] == str(uPassword):
        return render_template('useraccount.html')
    else:
        return redirect(url_for('login'))