How can I see the values ​​​​that I wrote in the fields?

Question

HTML

{% extends "base.html" %}

{% block content %}
<h1>Авторизация</h1>
<form action="" method="post" novalidate>
    {{ form.hidden_tag() }}
    <p>
        {{ form.username.label }}<br>
        {{ form.username(class="form-control") }}<br>
        {% for error in form.username.errors %}
    <div class="alert alert-danger" role="alert">
        {{ error }}
    </div>
    {% endfor %}
    </p>
    <p>
        {{ form.password.label }}<br>
        {{ form.password(class="form-control", type="password") }}<br>
        {% for error in form.password.errors %}
    <div class="alert alert-danger" role="alert">
        {{ error }}
    </div>
    {% endfor %}
    </p>
    <p>{{ form.remember_me() }} {{ form.remember_me.label }}</p>
    <p>{{ form.submit(type="submit", class="btn btn-primary") }}</p>
</form>
{% endblock %}

here is my code and I need to find out where my data is stored that I enter here this code is called by another code here it is

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, BooleanField, SubmitField
from wtforms.validators import DataRequired
from flask import Flask, url_for
from flask import render_template
from flask import redirect


app = Flask(__name__)
app.config['SECRET_KEY'] = 'yandexlyceum_secret_key'
class LoginForm(FlaskForm):
    username = StringField('Логин', validators=[DataRequired()])
    password = PasswordField('Пароль', validators=[DataRequired()])
    remember_me = BooleanField('Запомнить меня')
    submit = SubmitField('Войти')
    print('1')
    print(username)

@app.route('/login', methods=['GET', 'POST'])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        return redirect('/success')
    return render_template('login.html', title='Авторизация', form=form)


if __name__ == '__main__':
    app.run(port=8080, host='127.0.0.1')

once again