Error: Invalid parameter subscriberId: null

[WeFitterTech]

https://dev.fitbit.com/build/reference/web-api/developer-guide/using-subscriptions/#Creating-a-Subsc...

Following the above guide I attempted to implement subscriptions but, I keep getting the following error:

{

    "errors": [

        {

            "errorType": "validation",

            "fieldName": "subscriberId",

            "message": "Invalid parameter subscriberId: null"

        }

    ]

}

The link I used to get this response:

https://api.fitbit.com/1/user/-/activities/apiSubscriptions/B979MY-activities.json

What can I do to fix this problem?

[JohnFitbit]

@WeFitterTech

Sorry to hear that you're encountering this error.

Can you post your full HTTP message that you're requesting here? I need to see the endpoint, headers, and body of your request. I also want to know the error status code you're receiving. Please also PM me your Client ID (as it is sensitive).

Thanks!

[WeFitterTech]

@JohnFitbit 

The endpoint: https://api.fitbit.com/1/user/-/body/apiSubscriptions/B7JJT6-body.json

The header contains the Bearer token and the body is empty. I also sent the client ID in a PM.

Thanks for your reply!

[JohnFitbit · Accepted solution]

@WeFitterTech Thanks for confirming that information.

Your request appears to be missing the content-length header and this is required as per the documentation. Can you confirm you're including the size of the payload body?

[WeFitterTech]

That seems to be the solution, I must have missed that. Thank you so much for the support!