Database-driven applications, such as WordPress, use your database host name to connect to it.
You can connect to the database using the IP address in the Database server column.
188.8.131.52as your database's hostname.
If you need login information for the database, go to the Users tab. If you need to manage your databases' users' login info, see Reset your MySQL database password.
For other information to use in your database connection strings, see View my database details in Plesk hosting.