2FA + Add/Remove Auth Providers (#652)

* 2FA + Add/Remove Auth Providers

* fix fmt issue

migrations/20230711004131_2fa.sql

@@ -0,0 +1,15 @@
+-- Add migration script here
+ALTER TABLE states ADD COLUMN user_id bigint references users ON UPDATE CASCADE NULL;
+
+ALTER TABLE users ADD COLUMN totp_secret varchar(24) null;
+
+ALTER TABLE users ADD CONSTRAINT email_unique UNIQUE (email);
+
+DROP TABLE flows;
+DROP TABLE states;
+
+CREATE TABLE user_backup_codes (
+   user_id BIGINT NOT NULL REFERENCES users(id),
+   code BIGINT NOT NULL,
+   PRIMARY KEY (user_id, code)
+);