added customer user model

users/admin.py

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+from django.contrib import admin
+
+# Register your models here.

users/apps.py

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+from django.apps import AppConfig
+
+
+class UsersConfig(AppConfig):
+    name = 'users'

users/migrations/0001_initial.py

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+# Generated by Django 2.0.7 on 2018-08-10 20:30
+
+import django.contrib.auth.models
+import django.contrib.auth.validators
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('auth', '0009_alter_user_last_name_max_length'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='User',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('password', models.CharField(max_length=128, verbose_name='password')),
+                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
+                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
+                ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
+                ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
+                ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
+                ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 20 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=20, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
+                ('email', models.EmailField(max_length=254, verbose_name='email address')),
+                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups')),
+                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions')),
+            ],
+            options={
+                'verbose_name': 'user',
+                'verbose_name_plural': 'users',
+                'abstract': False,
+            },
+            managers=[
+                ('objects', django.contrib.auth.models.UserManager()),
+            ],
+        ),
+    ]

users/models.py

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+#!/usr/bin/env python3
+"""
+A custom user model.
+"""
+from django.db import models
+from django.contrib.auth.models import AbstractUser
+from django.utils.translation import gettext_lazy as _
+from django.contrib.auth.validators import UnicodeUsernameValidator
+
+class User(AbstractUser):
+	"""
+	A custom user model.
+	"""
+	username_validator = UnicodeUsernameValidator()
+	username = models.CharField(
+		_('username'),
+		max_length=20,
+		unique=True,
+		help_text=_("Required. 20 characters or fewer. "
+			+ "Letters, digits and @/./+/-/_ only."),
+		validators=[username_validator],
+		error_messages={
+			'unique': _("A user with that username already exists."),
+			},)
+	first_name = None
+	last_name = None
+	email = models.EmailField(_('email address'))
+
+	def get_full_name(self):
+		return None
+	def get_short_name(self):
+		return None

users/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

users/views.py

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+from django.shortcuts import render
+
+# Create your views here.