diff --git a/src/bot.ts b/src/bot.ts
index a641adb..af3a38a 100644
--- a/src/bot.ts
+++ b/src/bot.ts
@@ -13,12 +13,12 @@ import { channel, log_from, SimpleResult, split_promise } from "./utils.ts";
 const log = (...args: unknown[]) => log_from(import.meta.url, ...args);
 
 export class EpitlsBot {
-	bot;
-	token;
-	rest;
-	assoc_channel;
+	private bot;
+	private token;
+	private rest;
+	private assoc_channel;
 
-	constructor(bot_token: string) {
+	public constructor(bot_token: string) {
 		this.token = bot_token;
 		const intents = [GatewayIntentBits.Guilds];
 		this.bot = new Client({ intents });
@@ -29,7 +29,7 @@ export class EpitlsBot {
 		>();
 	}
 
-	async start() {
+	public async start() {
 		const { promise, resolver } = split_promise<void>();
 		this.bot.on("ready", () => resolver());
 		this.bot.login(this.token);
@@ -37,6 +37,23 @@ export class EpitlsBot {
 		await this.register_commands();
 	}
 
+	public async assign_role(user_id: string, guild_id: string, role_id: string) {
+		const guild = await this.bot.guilds.fetch(guild_id);
+		const member = await guild.members.fetch({ user: user_id });
+		const role = await guild.roles.fetch(role_id);
+		if (role === null) return console.error("Role", role_id, "not found in guild", guild_id);
+		member.roles.add(role_id);
+		log(`Assigned role '${role.name}' to user '${member.displayName}'.`);
+	}
+
+	public async *receive_associations() {
+		while (true) yield await this.assoc_channel.receive();
+	}
+
+	public bot_name() {
+		return this.bot.user?.displayName;
+	}
+
 	private async register_commands() {
 		const cmd = new SlashCommandBuilder()
 			.setName("associate")
@@ -74,19 +91,6 @@ export class EpitlsBot {
 		if (result === true) interaction.editReply(message_command_response_success());
 		else interaction.editReply(message_command_response_error(result));
 	}
-
-	async assign_role(user_id: string, guild_id: string, role_id: string) {
-		const guild = await this.bot.guilds.fetch(guild_id);
-		const member = await guild.members.fetch({ user: user_id });
-		const role = await guild.roles.fetch(role_id);
-		if (role === null) return console.error("Role", role_id, "not found in guild", guild_id);
-		member.roles.add(role_id);
-		log(`Assigned role '${role.name}' to user '${member.displayName}'.`);
-	}
-
-	async *receive_associations() {
-		while (true) yield await this.assoc_channel.receive();
-	}
 }
 
 function message_command_response_sending_email(email: string) {
diff --git a/src/cri.ts b/src/cri.ts
index ec98ab6..de83883 100644
--- a/src/cri.ts
+++ b/src/cri.ts
@@ -1,12 +1,13 @@
 import { z } from "https://deno.land/x/zod@v3.22.4/mod.ts";
 
 export class CriApi {
-	token;
-	constructor(token: string) {
+	private token;
+
+	public constructor(token: string) {
 		this.token = token;
 	}
 
-	async groups_of(login: string) {
+	public async groups_of(login: string) {
 		const response = await fetch(`https://cri.epita.fr/api/v2/users/${login}/`, {
 			headers: {
 				accept: "application/json",
@@ -31,7 +32,7 @@ export class CriApi {
 		return Array.from(result.values());
 	}
 
-	async user_exists(login: string) {
+	public async user_exists(login: string) {
 		const response = await fetch(`https://cri.epita.fr/api/v2/users/${login}/`, {
 			headers: {
 				accept: "application/json",
diff --git a/src/main.ts b/src/main.ts
index b07657d..2039526 100755
--- a/src/main.ts
+++ b/src/main.ts
@@ -10,12 +10,12 @@ const log = (...args: unknown[]) => log_from(import.meta.url, ...args);
 async function main() {
 	const secrets = await read_secrets(root_path() + "/secrets.json");
 	const rules = await RuleSet.from_file(root_path() + "/rules.json");
-	log("Loaded rules for", rules.rules.size, "groups.");
+	log("Loaded rules for", rules.size(), "roles.");
 	const state = await State.from_dir(root_path() + "/local");
 	log("Loaded state with", await state.users_count(), "users.");
 	const bot = new EpitlsBot(secrets.discord_bot_token);
 	await bot.start();
-	log(`Started bot '${bot.bot.user?.displayName}' .`);
+	log(`Started bot '${bot.bot_name()}' .`);
 	const cri_api = new CriApi(secrets.cri_token);
 
 	const service = new Service(state, bot, cri_api, rules);
diff --git a/src/rules.ts b/src/rules.ts
index 1f5cac0..2a1b0b5 100644
--- a/src/rules.ts
+++ b/src/rules.ts
@@ -1,12 +1,14 @@
-type SerializedRule = { group_id: string; target_role: TargetRole };
 export type TargetRole = { guild_id: string; role_id: string };
+type SerializedRule = { group_id: string; target_role: TargetRole };
+
 export class RuleSet {
-	rules;
-	constructor() {
+	private rules;
+
+	public constructor() {
 		this.rules = new Map<string, TargetRole[]>();
 	}
 
-	static async from_file(path: string) {
+	public static async from_file(path: string) {
 		const result = new RuleSet();
 		const file_content = await Deno.readTextFile(path);
 		const parsed = JSON.parse(file_content) as SerializedRule[];
@@ -14,6 +16,16 @@ export class RuleSet {
 		return result;
 	}
 
+	public roles_for_group(group_id: string) {
+		return this.rules.get(group_id) ?? [];
+	}
+
+	public size() {
+		let result = 0;
+		for (const roles of this.rules.values()) result += roles.length;
+		return result;
+	}
+
 	private append_rule(group_id: string, target_role: TargetRole) {
 		let roles = this.rules.get(group_id);
 		if (roles === undefined) {
@@ -22,8 +34,4 @@ export class RuleSet {
 		}
 		roles.push(target_role);
 	}
-
-	roles_for_group(group_id: string) {
-		return this.rules.get(group_id) ?? [];
-	}
 }
diff --git a/src/state.ts b/src/state.ts
index 498b7a8..c8e699b 100644
--- a/src/state.ts
+++ b/src/state.ts
@@ -43,9 +43,10 @@ export class State {
 		await this.kv.set(["users_by_discord_id/", discord_user_id], user_uuid);
 	}
 
-	async remove_user(discord_user_id: string) {
+	private async remove_user(discord_user_id: string) {
 		const { value: user_uuid } = await this.kv.get(["users_by_discord_id/", discord_user_id]);
 		if (user_uuid === null) return undefined;
 		await this.kv.delete(["users/", user_uuid as string]);
+		await this.kv.delete(["users_by_discord_id/", discord_user_id]);
 	}
 }