original_string: public function once(array $credentials = [])
      {
          $this->fireAttemptEvent($credentials);
  
          if ($this->validate($credentials)) {
              $this->setUser($this->lastAttempted);
  
              return true;
          }
  
          return false;
      }
code: public function once(array $credentials = [])
      {
          $this->fireAttemptEvent($credentials);
  
          if ($this->validate($credentials)) {
              $this->setUser($this->lastAttempted);
  
              return true;
          }
  
          return false;
      }
code_tokens: public function once ( array $ credentials = [ ] ) { $ this -> fireAttemptEvent ( $ credentials ) ; if ( $ this -> validate ( $ credentials ) ) { $ this -> setUser ( $ this -> lastAttempted ) ; return true ; } return false ; }
docstring: Log a user into the application without sessions or cookies.
  
  @param  array  $credentials
  @return bool
docstring_tokens: Log a user into the application without sessions or cookies .