You can directly modify the permission of the database account in the management console.
Go to the DDS Management Console.
Click Management Center -> Instance Management to go to the instance list page.
Select the instance for which you want to create a database account and click the instance ID of the instance to go to the instance details page.
Then click Account Management to go to the account management page.
Select the account for which you want to modify the permission, and click Modify Permission in the Operation column on the right. The Modify Permission pop-up window is displayed.
In the Modify Permission pop-up window, you can adjust the Database and Permission of this account according to your business needs.
After adjustment, click OK in the pop-up window to modify the permission of the database account.