text: CREATE TABLE `social_connections_issuer` (
    `user_id` bigint(20) unsigned NOT NULL,
    `issuer_content_id` varchar(255) NOT NULL,
    `ctime` bigint(20) unsigned NOT NULL,
    PRIMARY KEY (`issuer_content_id`, `user_id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
  