Make the schema non migration

schema.sql

@@ -1,4 +1,5 @@
-CREATE TABLE IF NOT EXISTS registration_codes (
+CREATE TABLE IF NOT EXISTS registration_codes
+(
   code           VARCHAR(60) NOT NULL UNIQUE,
   creationTime   TIMESTAMP   NOT NULL,
   expirationTime TIMESTAMP,
@@ -6,11 +7,10 @@ CREATE TABLE IF NOT EXISTS registration_codes (
   maxUsages      Integer     NOT NULL DEFAULT 1
 );
 
-CREATE TABLE IF NOT EXISTS registered_users (
+CREATE TABLE IF NOT EXISTS registered_users
+(
   registrationCode VARCHAR(60) NOT NULL UNIQUE,
   username         VARCHAR(30) NOT NULL UNIQUE,
+  registeredUserId VARCHAR(60) NOT NULL UNIQUE,
   registeredTime   TIMESTAMP   NOT NULL
 );
-
-ALTER TABLE registered_users
-  ADD COLUMN registeredUserId VARCHAR(60);