Unknown member

if (subcommand === "zmień-prezesa") {
            const channel_topic = interaction.channel.topic;

            if (!channel_topic || channel_topic !== name) return interaction.reply({ content: "`[ ❌ ]` Ten kanał nie należy do podanego klubu!", ephemeral: true });

            const club_data = database.get(`guilds.${name}`);
            const old_owner = database.get(`users.${club_data.owner}`);
            const new_owner = database.get(`users.${user.id}`);

            if (!new_owner) {
                database.set(`users.${user.id}`, {
                    club: "",
                    club_role: "",
                    pass_block: new Date().getTime(),
                    balance: 0,
                });

                return interaction.reply({ content: "`[ ✔️ ]` Pomyślnie utworzono konto użytkownika <@" + user.id + ">, użyj komendy ponownie!", ephemeral: true });
            }

            if (new_owner.club !== name) return interaction.reply({ content: "`[ ❌ ]` Podany użytkownik jest w innym klubie!", ephemeral: true });

            if (!club_data) return interaction.reply({ content: "`[ ❌ ]` Nie znaleziono klubu!", ephemeral: true });

            const m_guild = await interaction.client.guilds.cache.get(main_guild_id);
            const c_guild = await interaction.client.guilds.cache.get(interaction.guild.id);

            if (!m_guild || !c_guild) return interaction.reply({ content: "`[ ❌ ]` Nie udało się znaleźć serwera discord!", ephemeral: true });

            const m_old_member = await m_guild.members.fetch(club_data.owner);
            const c_old_member = await c_guild.members.fetch(club_data.owner);
            const m_new_member = await m_guild.members.fetch(user.id);
            const c_new_member = await c_guild.members.fetch(user.id);

            if (!m_old_member || !c_old_member || !m_new_member || !c_new_member) return interaction.reply({ content: "`[ ❌ ]` Nie udało się znaleźć użytkownika!", ephemeral: true });

            const m_rank_role = await m_guild.roles.cache.find(r => r.name === "• Zarząd Klubu | IFL");
            const c_rank_role = await c_guild.roles.cache.find(r => r.name === "✬ Prezes Klubu | IFL");
            const m_role = await m_guild.roles.cache.find(role => role.name === "• " + name + " | Kluby");
            const c_role = await c_guild.roles.cache.find(role => role.name === name + " | Kluby");

            if (!m_role || !c_role || !m_rank_role || !c_rank_role) return interaction.reply({ content: "`[ ❌ ]` Nie udało się znaleźć roli!", ephemeral: true });

            await m_old_member.roles.remove(m_rank_role);
            await c_old_member.roles.remove(c_rank_role);
            await m_old_member.roles.remove(m_role);
            await c_old_member.roles.remove(c_role);
            await m_new_member.roles.add(m_rank_role);
            await c_new_member.roles.add(c_rank_role);
            await m_new_member.roles.add(m_role);
            await c_new_member.roles.add(c_role);

            const uu3 = await interaction.guild.members.fetch(club_data.owner);

            let m_table = database.get(`guilds.${name}.members`);
            m_table = m_table.filter(value => value !== uu3.user.username);

            database.set(`guilds.${name}.members`, m_table);
            database.push(`guilds.${name}.members`, user.username);

            database.set(`guilds.${name}.owner`, user.id);
            database.set(`users.${user.id}.club`, old_owner.club);
            database.set(`users.${user.id}.club_role`, old_owner.club_role);
            database.set(`users.${club_data.owner}.club`, "");
            database.set(`users.${club_data.owner}.club_role`, "");

            interaction.reply({ content: "`[ ✔️ ]` Pomyślnie zmieniłeś prezesa klubu **" + name + "** na <@" + user.id + ">!", ephemeral: true });
        }

if (subcommand === "zmień-prezesa") {
            const channel_topic = interaction.channel.topic;

            if (!channel_topic || channel_topic !== name) return interaction.reply({ content: "`[ ❌ ]` Ten kanał nie należy do podanego klubu!", ephemeral: true });

            const club_data = database.get(`guilds.${name}`);
            const old_owner = database.get(`users.${club_data.owner}`);
            const new_owner = database.get(`users.${user.id}`);

            if (!new_owner) {
                database.set(`users.${user.id}`, {
                    club: "",
                    club_role: "",
                    pass_block: new Date().getTime(),
                    balance: 0,
                });

                return interaction.reply({ content: "`[ ✔️ ]` Pomyślnie utworzono konto użytkownika <@" + user.id + ">, użyj komendy ponownie!", ephemeral: true });
            }

            if (new_owner.club !== name) return interaction.reply({ content: "`[ ❌ ]` Podany użytkownik jest w innym klubie!", ephemeral: true });

            if (!club_data) return interaction.reply({ content: "`[ ❌ ]` Nie znaleziono klubu!", ephemeral: true });

            const m_guild = await interaction.client.guilds.cache.get(main_guild_id);
            const c_guild = await interaction.client.guilds.cache.get(interaction.guild.id);

            if (!m_guild || !c_guild) return interaction.reply({ content: "`[ ❌ ]` Nie udało się znaleźć serwera discord!", ephemeral: true });

            const m_old_member = await m_guild.members.fetch(club_data.owner);
            const c_old_member = await c_guild.members.fetch(club_data.owner);
            const m_new_member = await m_guild.members.fetch(user.id);
            const c_new_member = await c_guild.members.fetch(user.id);

            if (!m_old_member || !c_old_member || !m_new_member || !c_new_member) return interaction.reply({ content: "`[ ❌ ]` Nie udało się znaleźć użytkownika!", ephemeral: true });

            const m_rank_role = await m_guild.roles.cache.find(r => r.name === "• Zarząd Klubu | IFL");
            const c_rank_role = await c_guild.roles.cache.find(r => r.name === "✬ Prezes Klubu | IFL");
            const m_role = await m_guild.roles.cache.find(role => role.name === "• " + name + " | Kluby");
            const c_role = await c_guild.roles.cache.find(role => role.name === name + " | Kluby");

            if (!m_role || !c_role || !m_rank_role || !c_rank_role) return interaction.reply({ content: "`[ ❌ ]` Nie udało się znaleźć roli!", ephemeral: true });

            await m_old_member.roles.remove(m_rank_role);
            await c_old_member.roles.remove(c_rank_role);
            await m_old_member.roles.remove(m_role);
            await c_old_member.roles.remove(c_role);
            await m_new_member.roles.add(m_rank_role);
            await c_new_member.roles.add(c_rank_role);
            await m_new_member.roles.add(m_role);
            await c_new_member.roles.add(c_role);

            const uu3 = await interaction.guild.members.fetch(club_data.owner);

            let m_table = database.get(`guilds.${name}.members`);
            m_table = m_table.filter(value => value !== uu3.user.username);

            database.set(`guilds.${name}.members`, m_table);
            database.push(`guilds.${name}.members`, user.username);

            database.set(`guilds.${name}.owner`, user.id);
            database.set(`users.${user.id}.club`, old_owner.club);
            database.set(`users.${user.id}.club_role`, old_owner.club_role);
            database.set(`users.${club_data.owner}.club`, "");
            database.set(`users.${club_data.owner}.club_role`, "");

            interaction.reply({ content: "`[ ✔️ ]` Pomyślnie zmieniłeś prezesa klubu **" + name + "** na <@" + user.id + ">!", ephemeral: true });
        }