You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: table_admin.go
    path of file: ./repos/go-gin-api/internal/proposal/tablesqls
    
    the code of the file until where you have to start completion: package tablesqls

//CREATE TABLE `admin` (
//`id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键',
//`username` varchar(32) NOT NULL DEFAULT '' COMMENT '用户名',
//`password` varchar(100) NOT NULL DEFAULT '' COMMENT '密码',
//`nickname` varchar(60) NOT NULL DEFAULT '' COMMENT '昵称',
//`mobile` varchar(20) NOT NULL DEFAULT '' COMMENT '手机号',
//`is_used` tinyint(1) NOT NULL DEFAULT '1' COMMENT '是否启用 1:是  -1:否',
//`is_deleted` tinyint(1) NOT NULL DEFAULT '-1' COMMENT '是否删除 1:是  -1:否',
//`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
//`created_user` varchar(60) NOT NULL DEFAULT '' COMMENT '创建人',
//`updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
//`updated_user` varchar(60) NOT NULL DEFAULT '' COMMENT '更新人',
//PRIMARY KEY (`id`),
//UNIQUE KEY `unique_username` (`username`)
//) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='管理员表';

func CreateAdminTableSq
    
func CreateAdminTableSql() (sql string) {
	sql = "CREATE TABLE `admin` ("
	sql += "`id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键',"
	sql += "`username` varchar(32) NOT NULL DEFAULT '' COMMENT '用户名',"
	sql += "`password` varchar(100) NOT NULL DEFAULT '' COMMENT '密码',"
	sql += "`nickname` varchar(60) NOT NULL DEFAULT '' COMMENT '昵称',"
	sql += "`mobile` varchar(20) NOT NULL DEFAULT '' COMMENT '手机号',"
	sql += "`is_used` tinyint(1) NOT NULL DEFAULT '1' COMMENT '是否启用 1:是  -1:否',"
	sql += "`is_deleted` tinyint(1) NOT NULL DEFAULT '-1' COMMENT '是否删除 1:是  -1:否',"
	sql += "`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',"
	sql += "`created_user` varchar(60) NOT NULL DEFAULT '' COMMENT '创建人',"
	sql += "`updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',"
	sql += "`updated_user` varchar(60) NOT NULL DEFAULT '' COMMENT '更新人',"
	sql += "PRIMARY KEY (`id`),"
	sql += "UNIQUE KEY `unique_username` (`username`)"
	sql += ") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='管理员表';"

	return
}