Found cryptography library that was very easy to install.

Have hashing and verification functs ready.

data.cpp

@@ -6,7 +6,9 @@ SQLite::Database
 start_db() {
     SQLite::Database db("test.db3",
                         SQLite::OPEN_READWRITE | SQLite::OPEN_CREATE);
-
+    while (sodium_init()< 0){
+        std::cout << "SODIUM NOT WORKING";
+    }
     db.exec(
         "create table if not exists Customer (id integer primary key, name "
         "text, card_code varchar(20), verhicle int)");