users table endpoints. auth to fix

tables.sql

@@ -0,0 +1,19 @@
+CREATE TABLE public.users (
+	id serial NOT NULL,
+	username text NOT NULL,
+	"password" text NOT NULL,
+	groups_ids integer[] NULL,
+	last_seen_at timestamp with time zone NULL,
+	created_at timestamp with time zone NULL,
+	CONSTRAINT userid_pk PRIMARY KEY (id),
+	CONSTRAINT username_unique UNIQUE (username)
+);
+
+CREATE TABLE public.groups (
+	id serial NOT NULL,
+	groupname text NOT NULL,
+	join_code text NOT NULL,
+	users_ids integer[] NULL,
+	created_at timestamp with time zone NULL,
+	CONSTRAINT groupname_unique UNIQUE (username)
+);