CREATE TABLE {$NAMESPACE}_auth.auth_challenge (
id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
phid VARBINARY(64) NOT NULL,
userPHID VARBINARY(64) NOT NULL,
factorPHID VARBINARY(64) NOT NULL,
sessionPHID VARBINARY(64) NOT NULL,
challengeKey VARCHAR(255) NOT NULL COLLATE {$COLLATE_TEXT},
challengeTTL INT UNSIGNED NOT NULL,
properties LONGTEXT NOT NULL COLLATE {$COLLATE_TEXT},
dateCreated INT UNSIGNED NOT NULL,
dateModified INT UNSIGNED NOT NULL
) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};