Tango prevents a user's account from third-party hacks - you do not need to create a password that can be compromised, authorization requires 2-way authentication.
You should get a code either via SMS or Tango app (in case you are logging in from additional devices) upon each new entrance to the account.
Beware of scammers
Kind reminder: Tango employees NEVER request user’s personal activation codes (NEVER EVER EVER) and under no circumstances.
If any Tango user asks you to send 4 digits code - be aware that it is a SCAMMER. Immediately report and block such users.
If a scammer managed to log in to your account:
Open Tango Settings > Account > make sure you are the owner of the phone number, email and other credentials associated with the profile.
Choose Disconnect other Devices so that to prevent access from other third-party devices.
Check your coins and diamonds balance. If it hasn’t changed - then everything is ok.
If you noticed your balance changed - immediately contact support and provide all the details of the hacking scenario.
Do not panic! If you have already identified the scammer and undertaken steps above - you are definitely on the safe side.