models.py

from django.db import models

from django.contrib.auth.models import AbstractUser

from django.core.validators import MinLengthValidator, MaxLengthValidator

class User$($AbstractUser$)$:

phone$\_$number $=$ models.CharField$($max$\_$length$=15,$ unique$=$True, validators$=[$MinLengthValidator$(10),$ MaxLengthValidator$(15)])$

email $=$ models.EmailField$($blank$=$True$)$

groups $=$ models.ManyToManyField$($

'auth.Group',

related$\_$name$=$'custom$\_$user$\_$set', # Add a unique related$\_$name

blank$=$True,

help$\_$text$=$'The groups this user belongs to$.\text{'},$

verbose$\_$name$=$'groups',

$)$

user$\_$permissions $=$ models.ManyToManyField$($

'auth.Permission',

related$\_$name$=$'custom$\_$user$\_$set', # Add a unique related$\_$name

blank$=$True,

help$\_$text$=$'Specific permissions for this user.$\text{'},$

verbose$\_$name$=$'user permissions',

$)$

def $\_\_$str$\_\_($self$)$:

return self.username

class Contact$($models$.$Model$)$:

user $=$ models.ForeignKey$($User$,$ on$\_$delete$=$models.CASCADE$)$

name $=$ models.CharField$($max$\_$length$=255)$

phone$\_$number $=$ models.CharField$($max$\_$length$=15)$

def $\_\_$str$\_\_($self$)$:

return self.name

class SpamReport$($models$.$Model$)$:

reporter $=$ models.ForeignKey$($User$,$ on$\_$delete$=$models.CASCADE$)$

phone$\_$number $=$ models.CharField$($max$\_$length$=15)$

def $\_\_$str$\_\_($self$)$:

return self.phone$\_$number

serializers.py

from rest$\_$framework import serializers

from $.$models import User, Contact, SpamReport

class UserSerializer$($serializers$.$ModelSerializer$)$:

class Meta:

model $=$ User

fields $=(\text{'}$id$\text{'},$ 'username', 'phone$\_$number', 'email'$)$

class ContactSerializer$($serializers$.$ModelSerializer$)$:

class Meta:

model $=$ Contact

fields $=(\text{'}$id$\text{'},$ 'user', 'name', 'phone$\_$number'$)$

class SpamReportSerializer$($serializers$.$ModelSerializer$)$:

class Meta:

model $=$ SpamReport

fields $=(\text{'}$id$\text{'},$ 'reporter', 'phone$\_$number'$)$

urls.py

from django.urls import path, include

from rest$\_$framework.routers import DefaultRouter

from $.$views import UserViewSet, ContactViewSet, SpamReportViewSet

router $=$ DefaultRouter$()$

router.register$($r$\text{'}$users$\text{'},$ UserViewSet$)$

router.register$($r$\text{'}$contacts$\text{'},$ ContactViewSet$)$

router.register$($r$\text{'}$spamreports$\text{'},$ SpamReportViewSet$)$

urlpatterns $=[$

path$(\text{'}\text{'},$ include$($router$.$urls$)),$

$]$

views.py

from rest$\_$framework import viewsets, filters

from $.$models import User, Contact, SpamReport

from $.$serializers import UserSerializer, ContactSerializer, SpamReportSerializer

class UserViewSet$($viewsets$.$ModelViewSet$)$:

queryset $=$ User.objects.all$()$

serializer$\_$class $=$ UserSerializer

filter$\_$backends $=[$filters$.$SearchFilter$]$

search$\_$fields $=[\text{'}$username$\text{'},$ 'phone$\_$number'$]$

class ContactViewSet$($viewsets$.$ModelViewSet$)$:

queryset $=$ Contact.objects.all$()$

serializer$\_$class $=$ ContactSerializer

class SpamReportViewSet$($viewsets$.$ModelViewSet$)$:

queryset $=$ SpamReport.objects.all$()$

serializer$\_$class $=$ SpamReportSerializer

Check the above code for plagarism and if plagarism is found redo the code that will give plagarism less than $5\%$