❔ Update-database error

string connectionString;
if (string.IsNullOrWhiteSpace(ConnectionConfig.ConnectionString))
{
ConnectionConfig.ConnectionString = "Server=DAD\SQLEXPRESS;database=BA_ETicaretCore8523;Trusted_Connection=True;multipleactiveresultsets=true;";
}
connectionString = ConnectionConfig.ConnectionString;

optionsBuilder.UseSqlServer(connectionString);
}

Hello, when I download a project related to .net core and edit the connectionstring and update the data-database, Login failed for user 'sa'. I'm getting an error can anyone help?
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