How to Select Some Fields From Relations in Typeorm Relations

Question

I need to Select Some fields from relations in Nest.js TypeOrm . For Example My Entity is :

 @Entity()
 export class Chat {
 @PrimaryGeneratedColumn()
 public id: number;

 @Column()
 public orderId: number;

 @Column({ default: ChatStatus.Active })
 public status: ChatStatus;

 @Column()
 public userId: number;

 @ManyToOne(() => User, (user) => user.chats, { nullable: true })
 @JoinColumn({ name: 'userId' })
 public user: User;
}

Any In My Service :

async findAll(dataSearch) {
  return await this.chatRepository.find({
    relations: ['user'],
  });
}

I Want Just Select "name" , "avatar" from user relation but This select all Columns.

Thanks