Remove HTTP Basic authentication from the API

Fix intereference between NGINX basic authentication and DRF
http basic authentication.

website/thaliawebsite/settings/settings.py

@@ -166,7 +166,6 @@ AUTHENTICATION_BACKENDS = [
 REST_FRAMEWORK = {
     'DEFAULT_AUTHENTICATION_CLASSES': (
         'rest_framework.authentication.SessionAuthentication',
-        'rest_framework.authentication.BasicAuthentication',
         'rest_framework.authentication.TokenAuthentication',
     ),
     'DEFAULT_PAGINATION_CLASS':