如何使用spark-scala连接到CloudantDB并以数据帧的形式读取json文档？

import org.apache.spark.sql.SparkSession
import com.cloudant.spark._

val spark = SparkSession.builder()
    .appName("Connect to CloudantDB")
    .getOrCreate()

val cloudantOptions = Map(
    "cloudant.host" -> "your-cloudant-account.cloudant.com",
    "cloudant.username" -> "your-cloudant-username",
    "cloudant.password" -> "your-cloudant-api-key",
    "jsonstore.rdd.partitions" -> "10" // 可选：指定数据分区数
)

val dataFrame = spark.read.format("com.cloudant.spark")
    .options(cloudantOptions)
    .load("your-database-name")

dataFrame.printSchema() // 打印数据帧的结构
dataFrame.show() // 显示数据帧的内容

libraryDependencies += "com.cloudant" %% "cloudant-spark" % "2.0.0"