This is the 17933rd most frequent Russian word.
учетную
"Учётную" means "accounting" or "related to an account".
Here, "учетную" is used to describe the type of "запись" (record/account), signifying an account related to a system or service.
Пожалуйста, введи свою учетную запись, чтобы продолжить.
Please enter your account to proceed.
In this sentence, "учетную" modifies "запись" to specify a kind of record that serves as a user account.
Каждый пользователь должен создать учетную запись для входа.
Each user must create an account for login.
Here, "учетную" is describing "таблица" (table), referring to its function in accounting or keeping records.