These might help:
https://wiki.fitbit.com/display/API/API+Client+Libraries
The 1st link has 3rd party SDKs that are not really maintained but the 2 links below that are services that make connecting APIs easy. I haven't tried them but the concept makes sense.
The only potential issue is relying on a 3rd party service for uptime and data-privacy, but those requirements are different for everyone.
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