Tango prevents a user's account from third party hacks - you do not need to create a password which can be compromised, authorization requires 2-way authentication.
You should get 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 scammer managed to login to your account:
Open Tango Settings > Account Settings > Make sure you are the owner of the phone number, e-mal and other credentials associated with the profile. Choose 'Remove 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 to relink Payoneer if required .
Do not panic! If you already identified scammer and undertook steps above - you are definitely on the safe side.