Added a user system with no proper user validation but working authorisation.

backend/migrations/2022-03-19-191822_initial/down.sql

@@ -0,0 +1,4 @@
+-- This file should undo anything in `up.sql`
+
+drop table gamenight;
+drop table known_games;

backend/migrations/2022-03-19-191822_initial/up.sql

@@ -0,0 +1,12 @@
+-- Your SQL goes here
+
+CREATE TABLE gamenight (
+    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    game text TEXT NOT NULL,
+    datetime TEXT NOT NULL
+);
+
+CREATE TABLE known_games (
+    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    game TEXT UNIQUE NOT NULL
+);