ADD: added database connection for players data handling and started login funtion with database

backend/internal/common/passwordHasher.go

@@ -0,0 +1,12 @@
+package common
+
+import "golang.org/x/crypto/bcrypt"
+
+func HashPassword(password string) (string, error) {
+	// Use bcrypt to hash the password
+	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return "", err
+	}
+	return string(hashedPassword), nil
+}