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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Or if you mean there are other people other than you who can connect to the tunnel, then you could use HTTP basic authentication on NPM, or Authelia, or even Authentik. Not sure how easy it is to set them up with NPM, but with linuxserver.io's `swag` image, HTTP basic and Authelia are easy to set up while Authentik is a little more complicated but still doable.
NOTE:
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