Refactor and remove sqlite and replace with MySQL

internal/helpers/security/token.go

@@ -0,0 +1,15 @@
+package security
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+)
+
+func GenerateSecureToken() (string, error) {
+	b := make([]byte, 32)
+	_, err := rand.Read(b)
+	if err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(b), nil
+}