Django: command management call from model, from view or from where? - django

Question

I am new on Python3 and DJango.
I am writing an app where the user can register a Company using Company Name and AWS Access Key and Secret Key.
I will use the Access and Secret key to make a inventory "Discovery" of the AWS Account.
Well, I want what every time an user register a company (click to create) django executes a management command called infra_discovery.py inside my app_folder/management/commands (that is working fine when I call via python manage.py infra_discovery).
I have the following model:
from django.db import models
from django.urls import reverse
from django.contrib.auth.models import User
from empresa.models import Empresa
class InfraDiscovery(models.Model):
# user will fill this three fiels:
infra_empresa = models.ForeignKey('empresa.Empresa', on_delete=models.CASCADE, blank=True, null=True )
infra_aws_key = models.CharField(max_length=100, null=True, blank=True)
infra_aws_secret = models.CharField(max_length=255, null=True, blank=True)
# my script called infra_discovery have to fill this fields:
infra_vpc = models.TextField(blank=True, null=True )
infra_ec2 = models.TextField(blank=True, null=True )
infra_ebs = models.TextField(blank=True, null=True )
infra_rds = models.TextField(blank=True, null=True )
infra_vpn = models.TextField(blank=True, null=True )
infra_bill = models.TextField(blank=True, null=True )
def __str__(self):
return self.id
def get_absolute_url(self):
return reverse('infrastructure_discovery_edit', kwargs={'pk': self.pk})
I really don't know how to make django fulfill this fields using my script at every time user clicks in "create" button;
What are your suggestion to me?