code: public function visitPage($operation, $value = '')
      {
          $column = $value;
  
          // If we have an empty value then try to use current user.
          if ('' !== $value) {
              $column = strpos($value, '@') === false ? 'name' : 'mail';
          }
  
          // This helps us restrict an access for editing for users without correct permissions.
          // Will check for 403 HTTP status code.
          $this->getRedirectContext()
              // Check user by email if value contains a "dog" symbol.
              ->visitPage($this->entityUrl($operation, $column, $value));
      }
docs: @param string $operation
  Allowable values: "edit", "view", "visit".
  @param string $value
  The name or email of a user.
  
  @When /^(?:|I )(visit|view|edit) (?:the "([^"]+)"|current) user$/