add middlewares, handlers and database models

internal/db/migrations/00002_create_tokens_table.sql

@@ -0,0 +1,25 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS tokens (
+    id TEXT PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    type TEXT NOT NULL,
+    token TEXT UNIQUE NOT NULL,
+    expires_at TIMESTAMP NOT NULL,
+    used_at TIMESTAMP,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
+
+CREATE INDEX IF NOT EXISTS idx_tokens_token ON tokens(token);
+CREATE INDEX IF NOT EXISTS idx_tokens_expires_at ON tokens(expires_at);
+CREATE INDEX IF NOT EXISTS idx_tokens_user_id ON tokens(user_id);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP INDEX IF EXISTS idx_tokens_user_id;
+DROP INDEX IF EXISTS idx_tokens_expires_at;
+DROP INDEX IF EXISTS idx_tokens_token;
+DROP TABLE IF EXISTS tokens;
+-- +goose StatementEnd