fixup multiple clients support

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

proto/micro_errors.pb.go

@@ -0,0 +1,17 @@
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v3.10.4
+
+package servicepb
+
+import (
+	protojson "google.golang.org/protobuf/encoding/protojson"
+)
+
+var (
+	marshaler = protojson.MarshalOptions{}
+)
+
+func (m *Error) Error() string {
+	buf, _ := marshaler.Marshal(m)
+	return string(buf)
+}