title: Twitter Oauth2 - Error in obtaining the bearer token
body: <p>I have followed and double checked the steps to get a bearer token from <a href="https://dev.twitter.com/oauth/application-only" rel="nofollow">https://dev.twitter.com/oauth/application-only</a></p>
  
  <p>i keep getting the following error :<br>
  Status : 403 Forbidden
  {"errors":[{"code":99,"message":"Unable to verify your credentials","label":"authenticity_token_error"}]}</p>
  
  <p>I tried passing grant_type=client_credentials in body as well as query parameter.</p>
  
  <p>The URL i am hitting is : <a href="https://api.twitter.com/oauth2/token?grant_type=client_credentials" rel="nofollow">https://api.twitter.com/oauth2/token?grant_type=client_credentials</a></p>
  
  <p>Headers Set : 
  Authorization : Basic [base64encoded(client_key:client_secret)]
  Content-Type : application/x-www-form-urlencoded;charset=UTF-8</p>
  
  <p>I am using poster as the rest client to make the calls.</p>
  
  <p>Could any one point out where i may be going wrong.</p>
  
  <p>Thanks a lot.</p>