OAuth2 Refresh Token Invalid

[ParkJinsu]

Any ideas?

[JeremiahFitbit]

A refresh token will become invalid when:

• the refresh token is used (it can only be used once)
• a user revokes access to your application
• your application revokes its own access

Never share your client secret publicly! You posted a screenshot containing it in the Authorization header. Please reset your client secret in your app settings at https://dev.fitbit.com/apps and obscure the secret when requesting help publicly in the future.

[ParkJinsu]

Okay

i will  reset the client secret for this application

[ParkJinsu]

A refresh token will become invalid when:

• the refresh token is used (it can only be used once)
• a user revokes access to your application
• your application revokes its own access

i received  same error.

I using the Implicit Grant Flow.

[JeremiahFitbit]

There is no refresh token with Implicit Grant Flow. This flow allows you to obtain a consent for up to 1 year.