title: Issue installing R facebook HTTP 400
body: <p>I am trying to install the facebook API with R. I have seen that a few people were also having trouble but I did not find the same issues than me. 
  I have gotten the library but when I use the function
  fb_oauth &lt;- fbOAuth(...
  and after putting the URL on Facebook App Settings: <code>http://localhost:1410/</code>, I press enter and get the following message on the facebook page : </p>
  
  <pre><code>"Can't Load URL: The domain of this URL isn't included in the app's domains. To be able to load this URL, add all domains and subdomains of your app to the App Domains field in your app settings."
  </code></pre>
  
  <p>And on R : </p>
  
  <pre><code>Authentication complete.
  Error in oauth2.0_access_token(endpoint, app, code = code, user_params = 
  user_params,  : 
    Bad Request (HTTP 400). Failed to get an access token.
  </code></pre>
  
  <p>I have tried several things but nothing seems to have worked. Maybe I made a mistake when putting the URL but then I don't know where else I should put it... </p>
  
  <p>For the fb_oauth I have tried both with extended_permissions False and True
  and for app_id and app_secret I have used the info of the page : <a href="https://i.stack.imgur.com/HYP0h.png" rel="nofollow noreferrer">screen shot</a></p>
  
  <p>For the URL I have clicked on settings > Add Platform > Website > and then copied the URL <a href="https://i.stack.imgur.com/r3iO2.png" rel="nofollow noreferrer">second screenshot</a></p>
  
  <p>I really need this to work so I would appreciate so much if you could help me</p>