You can go to MySQL Console to modify the address of the server where your MySQL client is installed to control its access.
You can also use root account to log in to DMC.
You might be using a database account that is not authorized to create databases or tables. Please log in to MySQL Console, click the instance name and go to Database Management > Account Management, locate the account, and click Modify Permissions in the "Operation" column to grant permissions as shown below.
You might be using a sub-account without parameter modification permissions. You can use the root account or grant the sub-account permissions as instructed in Access Management.
To grant a user permissions to create and manage TencentDB instances, you can implement the
QcloudCDBFullAccess policy for the user as instructed in Full read/write permission policy for TencentDB.