feat: added users db, login, register, logout

sql/user.sql

@@ -0,0 +1,22 @@
+-- drop table if exists tokens;
+-- drop table if exists users;
+create table if not exists users (
+    id uuid primary key default gen_random_uuid(),
+    user_type integer default 0,
+    username varchar (120) not null,
+    email varchar (120) not null,
+    salt char (8) not null,
+    password char (60) not null, 
+    created_on timestamp default current_timestamp,
+    updated_at timestamp default current_timestamp,
+    lastlogin_at timestamp default current_timestamp
+);
+ 
+--drop table if exists tokens;
+create table if not exists tokens (
+    token varchar (120) primary key,
+    user_id uuid references users (id) on delete cascade,
+    time_to_live integer default 86400,
+    emit_day timestamp default current_timestamp
+);
+