refactor(core): Move all user DB access to UserRepository (#6910)

Prep for https://linear.app/n8n/issue/PAY-646

packages/cli/src/services/user.service.ts

@@ -0,0 +1,61 @@
+import { Service } from 'typedi';
+import type { EntityManager, FindManyOptions, FindOneOptions, FindOptionsWhere } from 'typeorm';
+import { In } from 'typeorm';
+import { User } from '@db/entities/User';
+import type { IUserSettings } from 'n8n-workflow';
+import { UserRepository } from '@/databases/repositories';
+
+@Service()
+export class UserService {
+	constructor(private readonly userRepository: UserRepository) {}
+
+	async findOne(options: FindOneOptions<User>) {
+		return this.userRepository.findOne({ relations: ['globalRole'], ...options });
+	}
+
+	async findOneOrFail(options: FindOneOptions<User>) {
+		return this.userRepository.findOneOrFail({ relations: ['globalRole'], ...options });
+	}
+
+	async findMany(options: FindManyOptions<User>) {
+		return this.userRepository.find({ relations: ['globalRole'], ...options });
+	}
+
+	async findOneBy(options: FindOptionsWhere<User>) {
+		return this.userRepository.findOneBy(options);
+	}
+
+	create(data: Partial<User>) {
+		return this.userRepository.create(data);
+	}
+
+	async save(user: Partial<User>) {
+		return this.userRepository.save(user);
+	}
+
+	async update(userId: string, data: Partial<User>) {
+		return this.userRepository.update(userId, data);
+	}
+
+	async getByIds(transaction: EntityManager, ids: string[]) {
+		return transaction.find(User, { where: { id: In(ids) } });
+	}
+
+	getManager() {
+		return this.userRepository.manager;
+	}
+
+	async updateSettings(userId: string, newSettings: Partial<IUserSettings>) {
+		const { settings } = await this.userRepository.findOneOrFail({ where: { id: userId } });
+
+		return this.userRepository.update(userId, { settings: { ...settings, ...newSettings } });
+	}
+
+	generatePasswordResetUrl(instanceBaseUrl: string, token: string) {
+		const url = new URL(`${instanceBaseUrl}/change-password`);
+
+		url.searchParams.append('token', token);
+
+		return url.toString();
+	}
+}