invalid_credentials: OAuth2

[bolom]

when i have tried to authenficate with the gem i have got

Started GET "/auth/slack/callback?code=45535405025.54851825376.b0253321d6&state=35fc27f9321826bc6862b6b116bff5dec189b3b5e8fcd87d" for ::1 at 2016-06-27 22:48:03 -0400
I, [2016-06-27T22:48:03.861285 #56935]  INFO -- omniauth: (slack) Callback phase initiated.
E, [2016-06-27T22:48:04.884077 #56935] ERROR -- omniauth: (slack) Authentication failure! invalid_credentials: OAuth2::Error, bad_client_secret: 
{"ok":false,"error":"bad_client_secret"}

but if i have do the same step manually i have got the access_token

[dodontommy]

+1 I'm getting this too