original_string: public function authenticate($token = false)
      {
          $id = $this->getPayload($token)->get('sub');
          if (! $this->auth->byId($id)) {
              return false;
          }
  
          return $this->auth->user();
      }
code: public function authenticate($token = false)
      {
          $id = $this->getPayload($token)->get('sub');
          if (! $this->auth->byId($id)) {
              return false;
          }
  
          return $this->auth->user();
      }
code_tokens: public function authenticate ( $ token = false ) { $ id = $ this -> getPayload ( $ token ) -> get ( 'sub' ) ; if ( ! $ this -> auth -> byId ( $ id ) ) { return false ; } return $ this -> auth -> user ( ) ; }
docstring: Authenticate a user via a token.
  
  @param mixed $token
  
  @return mixed
docstring_tokens: Authenticate a user via a token .