otel not pushing data to on-prem splunk

[DataOrg]

Below is the yaml file configuration, trying to configure the windows to collect data.

receivers:

  hostmetrics:

    collection_interval: 30s

    scrapers:

      cpu:

      memory:

      disk:

      filesystem:

      network:

      paging:

      processes:

exporters:

  splunk_hec:

    token: ""

    endpoint: "https://testsplunk.com:8088"

    source: "otelcol"

    sourcetype: "_json"

    index: "telemetry_test"

service:

  pipelines:

    metrics:

      receivers: [hostmetrics]

      exporters: [splunk_hec]