id int(11) not_null  auto_increment comment(Primary key - unique identifier for each failed attempt record)
identifier varchar(255) not_null comment(Identifier being tracked - typically API key, username, or IP address)
attempts int(11) default 1 comment(Number of consecutive failed authentication attempts)
last_attempt int(11) not_null comment(Unix timestamp of the most recent failed attempt)

--
primary id
idx_identifier identifier

##
engine innodb
character_set utf8mb4
collate utf8mb4_unicode_ci