First draft of refresh_tokens table

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

@@ -3,7 +3,10 @@ CREATE TABLE users (
     id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
 
     username varchar(32) UNIQUE NOT NULL,
-    password text NOT NULL
+    -- Hashed + salted representation of the username
+    password text NOT NULL,
+    -- Wether the user is currently blocked
+    blocked boolean DEFAULT false
 );
 
 -- Permissions that a user can have
@@ -15,3 +18,17 @@ CREATE TABLE permissions (
 
     UNIQUE (user_id, name)
 );
+
+-- TODO security reports table (e.g. when a user is blocked)
+
+-- Stores refresh tokens
+CREATE TABLE refresh_tokens (
+    -- This is more efficient than storing the text
+    token bytea PRIMARY KEY,
+    -- The user for whom the token was created
+    user_id uuid NOT NULL REFERENCES users(id),
+    -- When the token expires
+    expires_at timestamp NOT NULL,
+    -- When the token was last used (is NULL until used)
+    last_used_at timestamp
+);