Unable to retrieve the refresh token

[PalsN]

This is what my request for refresh token request looks like :

https://api.fitbit.com/oauth2/token?grant_type=refresh_token&refresh_token=470595744ae06e55a8dc9e3f2...

with headers set as below key value pairs

"Content-Type", "application/x-www-form-urlencoded"

"Authorization", "Basic 470595744ae06e55a8dc9e3f2c8f3c90bcc1996e68813f7005a090eca9dd84f3"

"470595744ae06e55a8dc9e3f2c8f3c90bcc1996e68813f7005a090eca9dd84f3" is the refresh_token received in the previous call auth call

I get the error HTTP error code : 401. Can you please let me know if I am missing something

[SunsetRunner]

The Authorization header doesnt appear to be built correctly, please see:

https://dev.fitbit.com/docs/oauth2/#access-token-request

[PalsN]

Thanks Dan, for your response. When I make the request ecoding the authorization header as described in the link that you shared, I am getting an error code 400.

[SunsetRunner]

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@PalsN wrote:

Thanks Dan, for your response. When I make the request ecoding the authorization header as described in the link that you shared, I am getting an error code 400.

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What are you getting in the response body for the request?