Yahoo oauth and Erlang

I successfully implemented or more aptly integrated yahoo oauth.
Points to note,

• You must sign in and get 
• Consumer key embeds what kind of service you are enlisted 
• Secret 
• App ID (you don't need it for YQL)
• For accessing private data -- it is 3 legged process -- 
• Get request token
• Use that to bring yahoo sign in page to ask user to give authorization to access services 
• Once user accepts, callback URL will be called and with query param 
• Once callback is complete, access actual DATA API using YQL
• YQL determines what service (like contact or connection etc) you are accessing but consumer key tells whether you have that service enabled. 
• If you later add or modify service access, you will get new consumer key
• diagnostics=true is handy to see what is wrong with your request
• Most of the oauth parameters are sent as query string
• Mostly more than 3 requests fired to yahoo to get a data
• window.opener will not work to communicate back to parent window because it is shifting to 2 different domains
• I used ugly timer to track popup window to closing status. I felt window.close event would have been handy.

I used nice little library for erlang (https://github.com/tim/erlang-oauth)