Update email_verification.py

app/cabinet/auth/email_verification.py

@@ -6,6 +6,27 @@ from datetime import datetime, timedelta
 from app.config import settings
 
 
+def generate_email_change_code() -> str:
+    """
+    Generate a 6-digit verification code for email change.
+
+    Returns:
+        6-digit numeric string
+    """
+    return str(secrets.randbelow(900000) + 100000)
+
+
+def get_email_change_expires_at() -> datetime:
+    """
+    Get the expiration datetime for an email change code.
+
+    Returns:
+        Datetime when the email change code expires
+    """
+    minutes = settings.get_cabinet_email_change_code_expire_minutes()
+    return datetime.utcnow() + timedelta(minutes=minutes)
+
+
 def generate_verification_token() -> str:
     """
     Generate a secure random verification token.