Conflicts:
	rest_framework/authentication.py
	rest_framework/relations.py
	rest_framework/serializers.py
	rest_framework/settings.py
	rest_framework/tests/authentication.py
	rest_framework/tests/genericrelations.py
	rest_framework/tests/generics.py
	rest_framework/tests/relations_hyperlink.py
	rest_framework/tests/relations_nested.py
	rest_framework/tests/relations_pk.py
	rest_framework/tests/serializer.py

It should have serializer_class in the same way as any other API view.

When incorrect parameters are supplied to the obtain auth token view
400 *is* the correct response.