magento installation error SQLSTATE[HY000] [1045] Access denied for user ‘root’@’localhost’ (using password: NO）

I want to install magento and I run the command below,

php bin/magento setup:install  --cleanup-database 
--base-url=“http://**.***.**.*/var/www/html/magento/“ 
--db-host=“database-1.************.***********-3.rds.amazonaws.com” 
--db-name=“magento2” 
--db-user=“admin” 
--db-password=“*********” 
--admin-firstname=“****” 
--admin-lastname=“*********” 
--admin-email=“************@gmail.com” 
--admin-user=“admin” 
--admin-password=“********” 
--language=“ja_JP” 
--currency=“JPY” 
--timezone=“Asia/Tokyo” 
--use-rewrites=“1”

Then I got an error,

SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: NO)
In InstallCommand.php line 282:
  Parameter validation failed 

As a test, I tried just the first command below,

php bin/magento setup:install  --cleanup-database

also I got the same error,

SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: NO)
In InstallCommand.php line 282:
  Parameter validation failed 

I think I have a problem on my database(MySql) but I’m not sure.

I am use RDS for database and running the commands on EC2.

Please help me!