original_string: protected function authenticate()
      {
          if ((!$this->storage->get('access_token'))) {
              try {
                  $this->getAccessToken();
              } catch(\Dropbox\Exception $e) {
                  $this->getRequestToken();
                  $this->authorise();
              }
          }
      }
code: protected function authenticate()
      {
          if ((!$this->storage->get('access_token'))) {
              try {
                  $this->getAccessToken();
              } catch(\Dropbox\Exception $e) {
                  $this->getRequestToken();
                  $this->authorise();
              }
          }
      }
code_tokens: protected function authenticate ( ) { if ( ( ! $ this -> storage -> get ( 'access_token' ) ) ) { try { $ this -> getAccessToken ( ) ; } catch ( \ Dropbox \ Exception $ e ) { $ this -> getRequestToken ( ) ; $ this -> authorise ( ) ; } } }
docstring: Authenticate using 3-legged OAuth flow, firstly
  checking we don't already have tokens to use
  @return void
docstring_tokens: Authenticate using 3 - legged OAuth flow firstly checking we don t already have tokens to use