connection problem to my database in C# and MySql

Question

Hello friends my name is Stalin and I have a connection problem to my database

I made a software and I connect through my local database;

When I install it on others PCs in my environment, the connection fail and prints this error:

Error: "host" Stalin-PC "is not allowed to connect to this mysql server"

 

My connection is via App.exe.config with the "System.Data.SqlClient" extension.

This is my connection. I did it dynamically for this reasons :

1) Connection to the database

2) License by installation date.

3) Disappear the button that makes possible the creation of the connection

 

 

Note: The language is C # (WPF) and Mysql (AppServer)