Django REST framework no authentication details

I am building out an API using Django rest framework, but I am having trouble authenticating a request using basic authentication. For testing purposes I have a view that, when called via POST and provided with a valid username/password for a User model, should return that model with the provided id, in this case id=1018

curl -X POST http://<my-url>/api/detail/1018 -u <username>:<password>
{"detail": "Authentication credentials were not provided."}

GET requests work fine as no authentication is required. I have been roughly following the rest framework tutorial. In each class I have permission_classes = (permissions.IsAuthenticatedOrReadOnly, IsOwnerOrReadOnly,)

And in permissions.py

from rest_framework import permissions

class IsOwnerOrReadOnly(permissions.BasePermission):

    def has_object_permission(self, request, view, obj):
        # Read permissions are allowed to any request,
        # so we'll always allow GET, HEAD or OPTIONS requests.
        if request.method in permissions.SAFE_METHODS:
            return True

        # Write permissions are only allowed to the owner of the account.
        # I have commented this out and set it to return True so that I can test
        # more easily narrow down the cause of the error.
        #obj.owner.id == request.user.id
        return True

I'm not even sure if it is a code issue, as it says that credentials were not provided, not that the credentials are wrong.