Add /me API endpoint

src/pretix/api/urls.py

@@ -7,7 +7,7 @@ from rest_framework import routers
 from pretix.api.views import cart
 
 from .views import (
-    checkin, device, event, item, oauth, order, organizer, voucher,
+    checkin, device, event, item, oauth, order, organizer, user, voucher,
     waitinglist, webhooks,
 )
 
@@ -72,4 +72,5 @@ urlpatterns = [
     url(r"^device/update$", device.UpdateView.as_view(), name="device.update"),
     url(r"^device/roll$", device.RollKeyView.as_view(), name="device.roll"),
     url(r"^device/revoke$", device.RevokeKeyView.as_view(), name="device.revoke"),
+    url(r"^me$", user.MeView.as_view(), name="user.me"),
 ]

src/pretix/api/views/user.py

@@ -0,0 +1,16 @@
+from oauth2_provider.contrib.rest_framework import OAuth2Authentication
+from rest_framework.authentication import SessionAuthentication
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+
+class MeView(APIView):
+    authentication_classes = (SessionAuthentication, OAuth2Authentication)
+
+    def get(self, request, format=None):
+        return Response({
+            'email': request.user.email,
+            'fullname': request.user.fullname,
+            'locale': request.user.locale,
+            'timezone': request.user.timezone
+        })