How to use

canLogin

method

in

com.atlassian.sal.api.auth.AuthenticationController

private Result getUserLoginResult(HttpServletRequest request, HttpServletResponse response, OAuthMessage message, Consumer consumer, Principal user) {
  // if a user is provided, they must exist and be able to login
  if (user != null && !authenticationController.canLogin(user, request)) {
    LOG.info("Access denied because user:'{}' cannot login", user.getName());
    sendError(response, HttpServletResponse.SC_UNAUTHORIZED, message);
    return new Result.Failure(new OAuthProblem.PermissionDenied(user.getName()));
  }
  LOG.info("Authenticated app '{}' as user '{}' successfully", consumer.getKey(), user == null ? "null" : user.getName());
  return new Result.Success(user);
}