Can I link my clients model with Django User models?

Hi im new using django and is a little confusing the part of model for my project now.

i need to create a site that user can have their profile and make post of product that they want to offer like a catalog and i'm thinking create this models:

class Users_Types(models.Model):

    user_type = models.CharField(max_length=1)
    def __str__(self):
        return self.user_type
        return self.id_type_user

class Users(models.Model):

    users_types= models.OneToOneField('Users_Types')
    e_mail = models.EmailField(unique=True)
    password = models.TextField()
    salt = models.TextField()
    def __str__(self):
        return self.id_user
        return self.id_type_user
        return self.e_mail
        return self.password
        return self.salt

class Clients(models.Model):
    users = models.OneToOneField('Users')
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=30)
    ci = models.CharField(max_length=9)
    birth_date = models.DateField(null=True, blank=True)
    phone = models.CharField(max_length=20)
    city = models.CharField(max_length=20, default=)


class products(models.Model):

    clients = models.ForeignKey('clients')
    product = models.CharField(max_length=30)
    description = models.CharField(max_length=30)
    Category = models.CharField(max_length=30)

but i read about django have it user model, i had to use that model instead that my Users model?

and how i can link the django user model with my clients model.

i appreciate your help!