val df = spark
        .read
        .format("bigquery")
        .option("table", "xxx")
        .option("dataset", "xxx")
        .option("parentProject", "xxx")
        .option("credentials", "base 64 encoded json file")
        .load()

df.schema()
df.count()
df.filter(...).count()

java.lang.RuntimeException: java.io.NotSerializableException: com.google.cloud.spark.bigquery.repackaged.com.google.auth.oauth2.AwsCredentials$AwsCredentialSource
  at com.google.cloud.bigquery.connector.common.BigQueryUtil.getCredentialsByteArray(BigQueryUtil.java:111)
  at com.google.cloud.bigquery.connector.common.BigQueryClientFactory.hashCode(BigQueryClientFactory.java:88)
  at java.util.HashMap.hash(HashMap.java:340)
  at java.util.HashMap.containsKey(HashMap.java:597)
  at com.google.cloud.bigquery.connector.common.BigQueryClientFactory.getBigQueryReadClient(BigQueryClientFactory.java:53)
  at com.google.cloud.bigquery.connector.common.ReadSessionCreator.create(ReadSessionCreator.java:79)
  at com.google.cloud.spark.bigquery.v2.context.BigQueryDataSourceReaderContext.planBatchInputPartitionContexts(BigQueryDataSourceReaderContext.java:197)
  at com.google.cloud.spark.bigquery.v2.BigQueryDataSourceReader.planBatchInputPartitions(BigQueryDataSourceReader.java:66)
  at org.apache.spark.sql.execution.datasources.v2.DataSourceV2ScanExec.batchPartitions$lzycompute(DataSourceV2ScanExec.scala:84)
  at org.apache.spark.sql.execution.datasources.v2.DataSourceV2ScanExec.batchPartitions(DataSourceV2ScanExec.scala:80)
  at org.apache.spark.sql.execution.datasources.v2.DataSourceV2ScanExec.outputPartitioning(DataSourceV2ScanExec.scala:60)
  at org.apache.spark.sql.execution.exchange.EnsureRequirements.$anonfun$ensureDistributionAndOrdering$1(EnsureRequirements.scala:149)
  at scala.collection.immutable.List.map(List.scala:293)
  at org.apache.spark.sql.execution.exchange.EnsureRequirements.org$apache$spark$sql$execution$exchange$EnsureRequirements$$ensureDistributionAndOrdering(EnsureRequirements.scala:148)
  at org.apache.spark.sql.execution.exchange.EnsureRequirements$$anonfun$apply$1.applyOrElse(EnsureRequirements.scala:312)
  at org.apache.spark.sql.execution.exchange.EnsureRequirements$$anonfun$apply$1.applyOrElse(EnsureRequirements.scala:304)
  at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformUp$2(TreeNode.scala:291)
  at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:73)
  at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:291)
  at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformUp$1(TreeNode.scala:288)
  at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$mapChildren$1(TreeNode.scala:339)
  at org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:197)
  at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:337)
  at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:288)
  at org.apache.spark.sql.execution.exchange.EnsureRequirements.apply(EnsureRequirements.scala:304)
  at org.apache.spark.sql.execution.exchange.EnsureRequirements.apply(EnsureRequirements.scala:37)
  at org.apache.spark.sql.execution.QueryExecution.$anonfun$prepareForExecution$1(QueryExecution.scala:108)
  at scala.collection.LinearSeqOptimized.foldLeft(LinearSeqOptimized.scala:126)
  at scala.collection.LinearSeqOptimized.foldLeft$(LinearSeqOptimized.scala:122)
  at scala.collection.immutable.List.foldLeft(List.scala:91)
  at org.apache.spark.sql.execution.QueryExecution.prepareForExecution(QueryExecution.scala:108)
  at org.apache.spark.sql.execution.QueryExecution.executedPlan$lzycompute(QueryExecution.scala:92)
  at org.apache.spark.sql.execution.QueryExecution.executedPlan(QueryExecution.scala:92)
  at org.apache.spark.sql.Dataset.withAction(Dataset.scala:3442)
  at org.apache.spark.sql.Dataset.head(Dataset.scala:2627)
  at org.apache.spark.sql.Dataset.take(Dataset.scala:2841)
  at org.apache.spark.sql.Dataset.getRows(Dataset.scala:255)
  at org.apache.spark.sql.Dataset.showString(Dataset.scala:292)
  at org.apache.spark.sql.Dataset.show(Dataset.scala:752)
  at org.apache.spark.sql.Dataset.show(Dataset.scala:711)
  at org.apache.spark.sql.Dataset.show(Dataset.scala:720)
  ... 49 elided
Caused by: java.io.NotSerializableException: com.google.cloud.spark.bigquery.repackaged.com.google.auth.oauth2.AwsCredentials$AwsCredentialSource
  at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
  at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
  at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
  at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
  at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
  at com.google.cloud.bigquery.connector.common.BigQueryUtil.getCredentialsByteArray(BigQueryUtil.java:108)
  ... 89 more