Add Coder to CountIfFn.Accum

[WARNING] 
java.lang.RuntimeException: java.io.IOException: Could not obtain a Coder for the accumulator
    at org.apache.beam.runners.core.construction.PipelineTranslation$1.leaveCompositeTransform (PipelineTranslation.java:78)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:584)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.access$500 (TransformHierarchy.java:239)
    at org.apache.beam.sdk.runners.TransformHierarchy.visit (TransformHierarchy.java:213)
    at org.apache.beam.sdk.Pipeline.traverseTopologically (Pipeline.java:468)
    at org.apache.beam.runners.core.construction.PipelineTranslation.toProto (PipelineTranslation.java:60)
    at org.apache.beam.runners.dataflow.DataflowRunner.run (DataflowRunner.java:996)
    at org.apache.beam.runners.dataflow.DataflowRunner.run (DataflowRunner.java:203)
    at org.apache.beam.sdk.Pipeline.run (Pipeline.java:322)
    at org.apache.beam.sdk.Pipeline.run (Pipeline.java:308)
    at com.hypertv.AnalyticsLoggerStore.PubsubToStorage.runPubsubToStoragePipeline (PubsubToStorage.java:115)
    at com.hypertv.AnalyticsLoggerStore.PubsubToStorage.main (PubsubToStorage.java:122)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run (ExecJavaMojo.java:282)
    at java.lang.Thread.run (Thread.java:829)
Caused by: java.io.IOException: Could not obtain a Coder for the accumulator
    at org.apache.beam.runners.core.construction.CombineTranslation$CombineGroupedValuesPayloadTranslator.extractAccumulatorCoder (CombineTranslation.java:207)
    at org.apache.beam.runners.core.construction.CombineTranslation$CombineGroupedValuesPayloadTranslator.translate (CombineTranslation.java:179)
    at org.apache.beam.runners.core.construction.PTransformTranslation$KnownTransformPayloadTranslator.translate (PTransformTranslation.java:438)
    at org.apache.beam.runners.core.construction.PTransformTranslation.toProto (PTransformTranslation.java:248)
    at org.apache.beam.runners.core.construction.SdkComponents.registerPTransform (SdkComponents.java:175)
    at org.apache.beam.runners.core.construction.PipelineTranslation$1.leaveCompositeTransform (PipelineTranslation.java:75)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:584)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.access$500 (TransformHierarchy.java:239)
    at org.apache.beam.sdk.runners.TransformHierarchy.visit (TransformHierarchy.java:213)
    at org.apache.beam.sdk.Pipeline.traverseTopologically (Pipeline.java:468)
    at org.apache.beam.runners.core.construction.PipelineTranslation.toProto (PipelineTranslation.java:60)
    at org.apache.beam.runners.dataflow.DataflowRunner.run (DataflowRunner.java:996)
    at org.apache.beam.runners.dataflow.DataflowRunner.run (DataflowRunner.java:203)
    at org.apache.beam.sdk.Pipeline.run (Pipeline.java:322)
    at org.apache.beam.sdk.Pipeline.run (Pipeline.java:308)
    at com.hypertv.AnalyticsLoggerStore.PubsubToStorage.runPubsubToStoragePipeline (PubsubToStorage.java:115)
    at com.hypertv.AnalyticsLoggerStore.PubsubToStorage.main (PubsubToStorage.java:122)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run (ExecJavaMojo.java:282)
    at java.lang.Thread.run (Thread.java:829)
Caused by: org.apache.beam.sdk.coders.CannotProvideCoderException: Cannot infer coder for type parameter AccumT
    at org.apache.beam.sdk.coders.CoderRegistry.getCoder (CoderRegistry.java:328)
    at org.apache.beam.sdk.transforms.CombineFnBase$AbstractGlobalCombineFn.getAccumulatorCoder (CombineFnBase.java:119)
    at org.apache.beam.sdk.transforms.Combine$CombineFn.getAccumulatorCoder (Combine.java:391)
    at org.apache.beam.sdk.extensions.sql.impl.transform.agg.AggregationCombineFnAdapter$WrappedCombinerBase.getAccumulatorCoder (AggregationCombineFnAdapter.java:75)
    at org.apache.beam.sdk.transforms.CombineFns$ComposedCombineFn.getAccumulatorCoder (CombineFns.java:430)
    at org.apache.beam.sdk.schemas.transforms.SchemaAggregateFn$Inner.getAccumulatorCoder (SchemaAggregateFn.java:335)
    at org.apache.beam.runners.core.construction.CombineTranslation$CombineGroupedValuesPayloadTranslator.extractAccumulatorCoder (CombineTranslation.java:204)
    at org.apache.beam.runners.core.construction.CombineTranslation$CombineGroupedValuesPayloadTranslator.translate (CombineTranslation.java:179)
    at org.apache.beam.runners.core.construction.PTransformTranslation$KnownTransformPayloadTranslator.translate (PTransformTranslation.java:438)
    at org.apache.beam.runners.core.construction.PTransformTranslation.toProto (PTransformTranslation.java:248)
    at org.apache.beam.runners.core.construction.SdkComponents.registerPTransform (SdkComponents.java:175)
    at org.apache.beam.runners.core.construction.PipelineTranslation$1.leaveCompositeTransform (PipelineTranslation.java:75)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:584)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.visit (TransformHierarchy.java:579)
    at org.apache.beam.sdk.runners.TransformHierarchy$Node.access$500 (TransformHierarchy.java:239)
    at org.apache.beam.sdk.runners.TransformHierarchy.visit (TransformHierarchy.java:213)
    at org.apache.beam.sdk.Pipeline.traverseTopologically (Pipeline.java:468)
    at org.apache.beam.runners.core.construction.PipelineTranslation.toProto (PipelineTranslation.java:60)
    at org.apache.beam.runners.dataflow.DataflowRunner.run (DataflowRunner.java:996)
    at org.apache.beam.runners.dataflow.DataflowRunner.run (DataflowRunner.java:203)
    at org.apache.beam.sdk.Pipeline.run (Pipeline.java:322)
    at org.apache.beam.sdk.Pipeline.run (Pipeline.java:308)
    at com.hypertv.AnalyticsLoggerStore.PubsubToStorage.runPubsubToStoragePipeline (PubsubToStorage.java:115)
    at com.hypertv.AnalyticsLoggerStore.PubsubToStorage.main (PubsubToStorage.java:122)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run (ExecJavaMojo.java:282)
    at java.lang.Thread.run (Thread.java:829)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  57.006 s
[INFO] Finished at: 2021-10-25T13:54:23Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.6.0:java (default-cli) on project connected-stories-analytics-logger-store: An exception occured while executing the Java class. java.io.IOException: Could not obtain a Coder for the accumulator: Cannot infer coder for type parameter AccumT -> [Help 1]