How can i register class using gremlin console?

[roamerop]

I want to visualize the graph using Gephi with the remote janusgraph server. I do the follow step, but get Server could not serialize the result requested error . How can i register class using gremlin console?

gremlin> :plugin use tinkerpop.gephi
gremlin> :remote connect tinkerpop.gephi
gremlin> :remote connect tinkerpop.server conf/remote-objects.yaml
==>Configured localhost/127.0.0.1:8182
gremlin> :> g.V()
gremlin> graph = result[0].getObject()
gremlin> :> graph
Server could not serialize the result requested. Server error - Error during serialization: Class is not registered: org.janusgraph.graphdb.database.StandardJanusGraph
Note: To register this class use: kryo.register(org.janusgraph.graphdb.database.StandardJanusGraph.class);. Note that the class must be serializable by the client and server for proper operation.
Type ':help' or ':h' for help.
Display stack trace? [yN]