How can i fix this error : { "detail": "Authentication credentials were not provided." } on Django RestFramework - api

Question

I am getting
{"detail": "Authentication credentials were not provided." }
when I run Django Restframework code.
in my settings.py
REST_FRAMEWORK = {
'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
'PAGE_SIZE': 10,
'NON_FIELD_ERRORS_KEY': 'error',
'DEFAULT_AUTHENTICATION_CLASSES': (
'rest_framework_simplejwt.authentication.JWTAuthentication',
),
Here is where the culprit lies when i make a request to input values
class CashflowListAPIView(ListCreateAPIView):
serializer_class = CashflowSerializer
queryset = Cashflow.objects.all()
permission_classes = (permissions.IsAuthenticated,)
def perform_create(self,serializer):
return serializer.save(owner=self.request.user)
def get_queryset(self):
return self.queryset.filter(owner = self.request.user)
class CashflowDetailAPIView(RetrieveUpdateDestroyAPIView):
serializer_class = CashflowSerializer
permission_classes = (permissions.IsAuthenticated,IsOwner,)
queryset = Cashflow.objects.all()
lookup_fields = 'id'
def get_queryset(self):
return self.queryset.filter(owner=self.request.user)
mind you, its supposed to work since user has gone through the authentication process VIA swagger API system on localhost:
SWAGGER_SETTINGS = {
'SECURITY_DEFINITIONS': {
'Bearer': {
'type': 'apiKey',
'name': 'Authorization',
'in': 'header'
}
}
}
How can i get my user to successfully input and fetch data without getting the message, { "detail": "Authentication credentials were not provided." }?
Your input is valued and appreciated. Thanks