Getting 403 "insufficient_permissions" on token request

[getrealhealth]

Here is the error we get for our clientID 23PQ7P on the token request. Please advise what could be the cause.

{
"success": false,
"errors": [{
"errorType": "insufficient_permissions",
"message": "API client is not authorized by Fitbit to access the resource requested. Visit https://dev.fitbit.com/docs/oauth2 for more information on the Fitbit Web API authorization process."
}]
}