Visual studio Database

so im wondering how connect to my database in Visual studio with unity i alryd know advanced Asp.net #C and how to do it for web but not quite sure how i have to write my connecting string code when its for unity like whats the difrence like normally when i make databases i have a webconfig so when i use untiy what do i have to do instead or is it just the same?

this is how i usally do it for web

         SqlConnection conn = new SqlConnection(); // sql connect
         conn.ConnectionString = ConfigurationManager.ConnectionStrings["DatabaseConnectionString1"].ToString();
         SqlCommand cmd = new SqlCommand();
         cmd.Connection = conn;
 
         // SQL strengen
         //cmd.CommandText = "INSERT INTO service_tb (service_title, service_text, fk_billed_id) VALUES (@title, @text, @billed)";
         cmd.CommandText = "INSERT INTO login_tb (login_user, login_pass, login_fornavn, login_efternavn, login_adresse, login_email, fk_rolle_id) VALUES (@user, @pass, @fornavn, @efternavn, @adresse, @email, 1)";
 
         // Tilføj parametrer (input fra TextBoxe fra .aspx siden) til din SQL streng ovenover
         cmd.Parameters.Add("@user", SqlDbType.NVarChar).Value = login_user_insert.Text;
         cmd.Parameters.Add("@pass", SqlDbType.NVarChar).Value = login_pass_insert.Text;
         cmd.Parameters.Add("@fornavn", SqlDbType.NVarChar).Value = login_fornavn_insert.Text;
         cmd.Parameters.Add("@efternavn", SqlDbType.NVarChar).Value = login_efternavn_insert.Text;
         cmd.Parameters.Add("@adresse", SqlDbType.NVarChar).Value = login_adresse_insert.Text;
         cmd.Parameters.Add("@email", SqlDbType.NVarChar).Value = login_email_insert.Text;
 
         conn.Open();
         SqlDataReader reader = cmd.ExecuteReader();
 
         conn.Close();
         Response.Redirect("admin.aspx?adminlogin=insert");

this is an insert from one of my projects