Update authtoken admin to make "user" a raw_id_field

If you have a large number of users this page will attempt to
load your entire User model dataset into a select box, which
will likely time out / crash the admin site.

rest_framework/authtoken/admin.py

@@ -22,6 +22,7 @@ class TokenChangeList(ChangeList):
 
 class TokenAdmin(admin.ModelAdmin):
     list_display = ('key', 'user', 'created')
+    raw_id_fields = ('user',)
     fields = ('user',)
     ordering = ('-created',)
     actions = None  # Actions not compatible with mapped IDs.