Added user table migrations

db/migration/000002_add_users.down.sql

@@ -0,0 +1,5 @@
+ALTER TABLE IF EXISTS "accounts" DROP CONSTRAINT IF EXISTS "owner_currency_key";
+
+ALTER TABLE IF EXISTS "accounts" DROP CONSTRAINT IF EXISTS "accounts_owner_fkey";
+
+DROP TABLE IF EXISTS "users";

db/migration/000002_add_users.up.sql

@@ -0,0 +1,13 @@
+CREATE TABLE "users" (
+  "username" varchar PRIMARY KEY,
+  "hashed_password" varchar NOT NULL,
+  "full_name" varchar NOT NULL,
+  "email" varchar UNIQUE NOT NULL,
+  "password_changed_at" timestamptz NOT NULL DEFAULT ('0001-01-01 00:00:00+00'),
+  "created_at" timestamptz NOT NULL DEFAULT (now())
+);
+
+ALTER TABLE "accounts" ADD FOREIGN KEY ("owner") REFERENCES "users" ("username");
+
+-- CREATE UNIQUE INDEX ON "accounts" ("owner", "currency");
+ALTER TABLE "accounts" ADD CONSTRAINT "owner_currency_key" UNIQUE ("owner", "currency");