Hold onto user accounts during migration drop

migrations/00001_AddUsers_down.sql

@@ -1,9 +1,6 @@
 -- bactdb
 -- Matthew R Dillon
 
--- Need to include something to keep gomigrate happy.
--- SELECT 1;
-
 DROP TABLE users;
 
 DROP TYPE e_roles;

migrations/00001_AddUsers_up.sql

@@ -1,17 +1,12 @@
 -- bactdb
 -- Matthew R Dillon
 
-DO $$
-BEGIN
-    IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'e_roles') THEN
-        CREATE TYPE e_roles AS ENUM('R', 'W', 'A');
-        -- 'R': read-only, default
-        -- 'W': read-write
-        -- 'A': administrator
-    END IF;
-END$$;
+CREATE TYPE e_roles AS ENUM('R', 'W', 'A');
+-- 'R': read-only, default
+-- 'W': read-write
+-- 'A': administrator
 
-CREATE TABLE IF NOT EXISTS users (
+CREATE TABLE users (
     id BIGSERIAL NOT NULL,
     email CHARACTER VARYING(254) NOT NULL UNIQUE,
     password CHARACTER(60) NOT NULL,