security: access control for particles (#169)

* setup firebase custom token

* docs

* docs

* feat: allow admin removing members from a network

* fix: properly handle fallback avatar and names

This is especially helpful in the case of members who were removed from
a network

go/internal/network/service_test.go

@@ -32,7 +32,7 @@ func newTestService(t *testing.T) network.Service {
 		ShootEmail(gomock.Any(), gomock.Any()).
 		Return(&pbaero.ShootEmailResponse{}, nil).
 		AnyTimes()
-	return network.NewService(dbPool, mockAero, billing.Noop())
+	return network.NewService(dbPool, mockAero, billing.Noop(), nil)
 }
 
 func TestNetworkService(t *testing.T) {