``` my $linkedin = Net::Linkedin::OAuth2->new( key => 'your-app-key', secret => 'your-app-secret');

   get authorization url({ redirect_uri =>
       'http://localhost:3000/user/linkedin', scope =>
       ['r_basicprofile','rw_groups','r_emailaddress']})
       # scope is an array of permissions that your app requires, see
       http://developer.linkedin.com/documents/authentication#granting for
       more details, this field is optional

       my $authorization_code_url = $linkedin->authorization_code_url(
           redirect_uri => 'url_of_your_app_to_intercept_success',
           scope    => ['r_basicprofile','rw_groups','r_emailaddress'] );

       # convert code response to an access token # redirect_uri is the url
       where you will check for the parameter code.  # param('code') is the
       parameter 'code' that you will get after the user authorizes your app
       and gets redirected to the redirect_uri (callback) page.

       my $token_object = $linkedin->get_access_token(
            authorization_code => param('code'),      redirect_uri =>
       'your-app-redirect-url-or-callback' );

       # use the new token to request user information

       my $result = $linkedin->request(      url    =>
       'https://api.linkedin.com/v1/people/~:(id,formatted-name,picture-url,email-address)?format=json',
            token  => $token_object->{access_token} );

       # we have the email address              if ($result->{emailAddress}) {
                   # ...  }

       # Or here is an entire login logic or recipe:

               my $linkedin = Net::Linkedin::OAuth2->new( key => 'your-app-key',
                                                  secret => 'your-app-secret');

               # catch the code param and try to convert it into an access_token and get the email address
               if (param('code')) {

                   my $token_object = $linkedin->get_access_token(
                           authorization_code => param('code'),
                           # has to be the same redirect_uri you specified in the code before
                           redirect_uri =>       'your-app-redirect-uri-or-callback-url'
                   );

                   my $result = $linkedin->request(
                       url    => 'https://api.linkedin.com/v1/people/~:(id,formatted-name,picture-url,email-address)?format=json',
                               token  => $token_object->{access_token} );

                       if ($result->{emailAddress}) {
                               # we have the email address, authenticate the user and redirect somewhere..
                               # ....

                               return;
                       } else {
                               # we did not get an email address
                               # redirect to try again?

                               return;
                       }

               }

               # get the url for permissions

               my $authorization_code_url = $linkedin->authorization_code_url(
                       # this field is required
                   redirect_uri => 'your-app-redirect',
                          #array of permissions that your app requires, see http://developer.linkedin.com/documents/authentication#granting for more details, this field is optional
                   scope    => ['r_basicprofile','rw_groups','r_emailaddress']
               );

               #redirect the user to get their permission
               redirect($authorization_code_url);

               # and catch an error back from linked in
               if (param('error')) {
                   # handle the error
                   # if the user denied, redirect to try again...
               }
```
=SEE ALSO
               http://developer.linkedin.com/documents