Started writing auth sql schema

migrations/2021-08-20-110251_users-and-auth/down.sql

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+-- This file should undo anything in `up.sql`

migrations/2021-08-20-110251_users-and-auth/up.sql

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+-- Users
+CREATE TABLE users (
+    id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
+
+    username varchar(32) UNIQUE NOT NULL,
+    password text NOT NULL
+);
+
+-- Permissions that a user can have
+CREATE TABLE permissions (
+    id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
+
+    user_id uuid REFERENCES users (id) NOT NULL,
+    name varchar NOT NULL,
+
+    UNIQUE (user_id, name)
+);