Should you need to update the password to access the database of Plesk for any reason, please follow the steps:

Step 1:

Log in to your Internic account, select “Products” on the left-hand side, then from the top toolbar, click “Hosting”.

Step 2: 

Click directly on Control Panel for the intended hosting package. This will open the Hosting OS in a new tab.

Step 3: 

You can click on "Dashboard" right under your domain name, which will display a list of different options. Please select "Databases" on the right-hand side.

Or you can also click on the "Databases" option on your left side: 

Step 4: 

In the upper left, you will see an option that says "User management". Click this. Then you will be able to click directly on the username for which you want to apply a new password. 

Once you have completed entering your new password and confirmed it, click Apply and OK.