How to retrieve user object using PostMan to test my endpoints - sqlite

Question

Users can create and maintain their profiles rather than enter in
their information each time they order
API Actions:
Retrieve a User Object and its fields by their username
Update the user and any of their fields except for mail
This is my code below:
views.py
"""api views inlcude method: customer list, """
#csrf allows for post without auth
#csrf_exempt
def List_All_Customers(request):
customer = Customer.objects.all()
#returns all the customer from db
if request.method == 'GET':
serializer = CustomerSerializer(customer, many=True)
return JsonResponse(serializer.data, status= 200, safe=False)
#add new customer in the db
elif request.method == 'POST':
data = JSONParser().parse(request)
serializer = CustomerSerializer(data=data)
if serializer.is_valid():
serializer.save()
return JsonResponse(serializer.data, status=201)
return JsonResponse(serializer.errors, status=400)
#csrf_exempt
def Customer_detail(customer):
#check if the customer with the given name is in the database
try:
customer = Customer.objects.filter(name = name)
#if not in database, throw 400 error
except Customer.DoesNotExist:
return HttpResponse(status = 404)
#if customer exists with the given name and is a get method, return that name object
if request.method == 'GET':
serializer = CustomerSerializer(customer)
return JsonResponse(serializer.data)
#delete method will delete the customer with a specific name
elif request.method == 'DELETE':
Customer.objects.filter(name = name).delete()
return HttpResponse(status=204)
#csrf_exempt
def get_current_user(request):
if request.method == 'POST':
customer = request.POST.get('name')
customer = authenticate(user=user)
if customer:
if customer.is_authenticated:
signBool = signatureAuth(username)
if signBool == 'AUTHENTICATED':
login(request, customer, backend=settings.AUTHENTICATION_BACKEND[0])
return JsonResponse(serializer.data)
'''
return JsonResponse({
'user':customer.user,
'name':customer.name,
'email':customer.email,
})
'''
model.py
class Customer(models.Model):
user=models.CharField(max_length=200,null=True)
name=models.CharField(max_length=200,null=True)
email=models.CharField(max_length=200,null=True)
password=models.CharField(max_length=200,null=True)
card_info=models.CharField(max_length=200,null=True)
def __str__(self):
return str(self.Customer)