Vertex - finish reason and usage info fix. Closes #95, #96

Author: peterbanda

google-vertexai-client/src/main/scala/io/cequence/openaiscala/vertexai/service/impl/package.scala

@@ -38,7 +38,6 @@ import java.{util => ju}
 import scala.collection.convert.ImplicitConversions.`iterable asJava`
 import scala.collection.convert.ImplicitConversions.`map AsJavaMap`
 import scala.collection.convert.ImplicitConversions.`list asScalaBuffer`
-import io.cequence.openaiscala.domain.response.PromptTokensDetails
 
 package object impl {
 
@@ -101,7 +100,10 @@ package object impl {
           .addParts(0, Part.newBuilder().setText(content).build())
           .build()
 
-      case x: BaseMessage => throw new OpenAIScalaClientException(s"Unsupported message type: ${x.getClass().getName()}")
+      case x: BaseMessage =>
+        throw new OpenAIScalaClientException(
+          s"Unsupported message type: ${x.getClass().getName()}"
+        )
     }
 
   def toSystemVertexAI(
@@ -267,8 +269,7 @@ package object impl {
         ChatCompletionChoiceInfo(
           index = candidate.getIndex,
           message = toOpenAIAssistantMessage(candidate.getContent),
-          finish_reason =
-            Some(candidate.getFinishReason.toString()),
+          finish_reason = Some(candidate.getFinishReason.toString()),
           logprobs = None
         )
       },
@@ -289,7 +290,7 @@ package object impl {
     OpenAIUsageInfo(
       prompt_tokens = usageInfo.getPromptTokenCount,
       total_tokens = usageInfo.getTotalTokenCount,
-      completion_tokens = Some(usageInfo.getCandidatesTokenCount),
+      completion_tokens = Some(usageInfo.getCandidatesTokenCount)
       // prompt_tokens_details = Some(
       //   PromptTokensDetails(
       //     cached_tokens = usageInfo.getCachedContentTokenCount.getOrElse(0),