Hi @Tuan Nguyen - welcome to the Community!
Unfortunately we do not support log in issues over the Community.
If you're having log in issues, you'll need to raise a ticket. You can do this by:
- Head to https://trello.com/contact
- Scroll down to the contact form
- For the field 'What can we help you with?', select Account issues
- For the field 'Pick a topic', select Trouble logging in
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