Imports
- cloud.google.com/go/firestore
- github.com/ThreeDotsLabs/watermill
- github.com/ThreeDotsLabs/watermill/message
- github.com/pkg/errors
- golang.org/x/sync/errgroup
- google.golang.org/api/iterator
- google.golang.org/api/option
- google.golang.org/grpc/codes
- google.golang.org/grpc/status