How to add a field when registering Django Allauth?

Question

Django

Good afternoon, I have a standard registration on allauth without email, as it is outdated and everyone uses messengers. In my project, Telegram will be the main channel for correspondence with project participants.
How to add a telegram field with certain validations to the registration?

models.py

from django.contrib.auth.models import AbstractUser
class UserProfile(AbstractUser):

    balance = models.IntegerField(default=0)
    telegram = models.CharField(max_length=24,blank=True)

    def __unicode__(self):
        return self.user.username

signup.html

<form class="form" method="post" id="signupform">
        {% csrf_token %}
        {{ form.errors }}
        <div class="form-group">
            <input type="text" class="form-control form-control-lg" id='id_username' name='username' placeholder="Login" required autofocus>
        </div>
        <div class="row">
            <div class="col-md-6">
                <div class="form-group">
                    <input type="password" class="form-control form-control-lg" id='id_password1' name='password1' placeholder="Password" required>
                </div>
            </div>
            <div class="col-md-6">
                <div class="form-group">
                    <input type="password" class="form-control form-control-lg" id='id_password2' name='password2' placeholder="Repeat Password" required>
                </div>
            </div>
        </div>
        {% if redirect_field_value %}
        <input type="hidden" name="{{ redirect_field_name }}" value="{{ redirect_field_value }}">
    </form>

I added a telegram field to the user, but how to shove it into the registration itself and then add validity checks?