I cannot successfully get metric using the Java SDK.

Hello, I am currently using the service of version v3.148.0. I want to obtain the metric information such as totalTokens, totalObservations, totalTraces through the Java SDK. However, I cannot successfully get it using the Java SDK. Could you please write a simple example for me? How should I implement this?

like ： http://langfuse.eaydu.com/api/trpc/users.metrics?input=

response:
{"result":{"data":{"json":[{"userId":"rtnpe","environment":"default","firstTrace":"2026-01-21T03:56:27.184Z","lastTrace":"2026-01-21T07:39:59.604Z","totalPromptTokens":"5513","totalCompletionTokens":"528","totalTokens":"6041","totalObservations":"12","totalTraces":"7","sumCalculatedTotalCost":6569},{"userId":"test","environment":"default","firstTrace":"2026-01-23T03:48:03.822Z","lastTrace":"2026-01-23T07:04:11.190Z","totalPromptTokens":"0","totalCompletionTokens":"0","totalTokens":"0","totalObservations":"4","totalTraces":"2","sumCalculatedTotalCost":0},{"userId":"agent-evaluator","environment":"default","firstTrace":"2026-01-16T10:47:30.394Z","lastTrace":"2026-01-16T10:47:37.402Z","totalPromptTokens":"23912","totalCompletionTokens":"653","totalTokens":"24565","totalObservations":"4","totalTraces":"2","sumCalculatedTotalCost":25218},{"userId":"agentFrameGO","environment":"default","firstTrace":"2026-01-16T11:15:30.637Z","lastTrace":"2026-01-23T07:07:20.554Z","totalPromptTokens":"85764","totalCompletionTokens":"127","totalTokens":"85891","totalObservations":"16","totalTraces":"11","sumCalculatedTotalCost":86018}],"meta":{"values":{"0.firstTrace":["Date"],"0.lastTrace":["Date"],"0.totalPromptTokens":["bigint"],"0.totalCompletionTokens":["bigint"],"0.totalTokens":["bigint"],"0.totalObservations":["bigint"],"0.totalTraces":["bigint"],"1.firstTrace":["Date"],"1.lastTrace":["Date"],"1.totalPromptTokens":["bigint"],"1.totalCompletionTokens":["bigint"],"1.totalTokens":["bigint"],"1.totalObservations":["bigint"],"1.totalTraces":["bigint"],"2.firstTrace":["Date"],"2.lastTrace":["Date"],"2.totalPromptTokens":["bigint"],"2.totalCompletionTokens":["bigint"],"2.totalTokens":["bigint"],"2.totalObservations":["bigint"],"2.totalTraces":["bigint"],"3.firstTrace":["Date"],"3.lastTrace":["Date"],"3.totalPromptTokens":["bigint"],"3.totalCompletionTokens":["bigint"],"3.totalTokens":["bigint"],"3.totalObservations":["bigint"],"3.totalTraces":["bigint"]},"referentialEqualities":{"1.totalPromptTokens":["1.totalCompletionTokens","1.totalTokens"],"1.totalObservations":["2.totalObservations"],"1.totalTraces":["2.totalTraces"]}}}}}