Add the `/account/whoami` endpoint to generic workers (#12866)

changelog.d/12866.misc

+Enable the `/account/whoami` endpoint on synapse worker processes. Contributed by Nick @ Beeper.

docs/workers.md

@@ -208,6 +208,7 @@ information.
     ^/_matrix/client/(v1|unstable/org.matrix.msc2946)/rooms/.*/hierarchy$
     ^/_matrix/client/unstable/im.nheko.summary/rooms/.*/summary$
     ^/_matrix/client/(r0|v3|unstable)/account/3pid$
+    ^/_matrix/client/(r0|v3|unstable)/account/whoami$
     ^/_matrix/client/(r0|v3|unstable)/devices$
     ^/_matrix/client/versions$
     ^/_matrix/client/(api/v1|r0|v3|unstable)/voip/turnServer$

synapse/app/generic_worker.py

@@ -87,7 +87,7 @@ from synapse.rest.client import (
     voip,
 )
 from synapse.rest.client._base import client_patterns
-from synapse.rest.client.account import ThreepidRestServlet
+from synapse.rest.client.account import ThreepidRestServlet, WhoamiRestServlet
 from synapse.rest.client.devices import DevicesRestServlet
 from synapse.rest.client.keys import (
     KeyChangesServlet,
@@ -289,6 +289,7 @@ class GenericWorkerServer(HomeServer):
                     RegistrationTokenValidityRestServlet(self).register(resource)
                     login.register_servlets(self, resource)
                     ThreepidRestServlet(self).register(resource)
+                    WhoamiRestServlet(self).register(resource)
                     DevicesRestServlet(self).register(resource)
 
                     # Read-only