Ruby on Rails - SoundCloud OAuth 2 undefined method `access_token' - ruby-on-rails

Question

I am working on a making a personal soundcloud app on Rails 5 and i'm having some trouble with OAuth. I'm able to redirect to Soundcloud's app and give permission to my user. When I try to exchange the code for token on redirect_uri, get an error. I have included my code and image of the error I'm getting below.
def connected
client = Soundcloud.new(:client_id => 'My ID',
:client_secret => 'my secret',
:redirect_uri => "http://localhost:3000/login/soundcloud/callback")
code = params[:code]
value = client.exchange_token(:code => code) #get an error on this line
#my code to save access token into db goes here.
end
I have added this image
for the error that I'm getting. I thought it might be more helpful.

Answer 1

I was having the same issues, so I just did created the request manually for this step. Soundcloud gem is pretty dated, I'm sure it has something to do with that.
#client = Soundcloud.new(client_id: client_id,
client_secret: client_secret,
redirect_uri:'http://localhost:3000/soundcloud/connected')
#code = params[:code]
response = HTTParty.post("https://api.soundcloud.com/oauth2/token",
body: {
"client_id" => client_id,
"client_secret" => client_secret,
"redirect_uri" => 'http://localhost:3000/soundcloud/connected',
'grant_type'=> 'authorization_code',
"code" => #code
}
)
access_token = response["access_token"]
#authed_client = Soundcloud.new(access_token: access_token)
soundcloud_user = #authed_client.get('/me')
end
Hope this helps.