title: possible to use eager loading in TypeORM with out defining a relationship?
body: <p>I want to add Creator Field to all my entities for Authorization purposes . Previously i had a OneToOne relation from every entity to User entity but now i see it is adding Constraint to that tables and eventually a user is not able to create more than a single record .
  then i think of another Solution it was adding a ManyToOne relationship which it really is but the problem is that you have to add a corresponding field to User for every single entitiy you create .
  like createdPosts,createdLikes,createdComments and this is also not what i need .
  there is also another option to add a Creator field with a number type and leftjoin to get user every time is fetch but that add so much burden for maintenance.
  so is there any built-in solution for this in TypeORM to add a Field Creator to my entities with a User Type and also have the Option to eager load it during gets and Fetchs ?</p>
  <pre><code>class User extends BaseEntity {
      @PrimaryGeneratedColumn()
      id: number; 
  }
  class Service extends BaseEntity {
      @PrimaryGeneratedColumn()
      id: number;
  
      @Column()
      creator: User
   
  }
  </code></pre>