Added sync

pkg/grpc/ctrlserver/authentication.proto

@@ -0,0 +1,18 @@
+syntax = "proto3";
+package rpctypes;
+
+option go_package = "pkg/rpc";
+
+service Authentication {
+    rpc JoinMesh(JoinAuthMeshRequest) returns (JoinAuthMeshReply) {}
+}
+
+message JoinAuthMeshRequest {
+    string meshId = 1;
+    string alias = 2;
+}
+
+message JoinAuthMeshReply {
+    bool success = 1;
+    optional string token = 2;
+}