What is a one-time password? Can't access my Square Enix account

I signed up to a SE account some time ago, it was the only time I logged in their account system. When I tried accessing it again yesterday to pre-order a game from their store it asked me to login with my SE account, which requires 2 passwords? I'm sure I signed up with 1 password, I even

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SQUARE ENIX The Official SQUARE ENIX Website

SquareEnix Security Token available

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I created a Square Enix account to play Final Fantasy 14. But how do I get a one-time password to log into FF14? - Quora

SQUARE ENIX The Official SQUARE ENIX Website

Square Enix Support Centre - Square Enix Account

Square Enix NA Support (@SE_NA_Support) / X

SquareEnix Security Token available

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