findAndCountAll with two or more included models.

Issue Creation Checklist

[+] I have read the contribution guidelines

Issue Description

I can't find the right way how to get all Posts with two or more related models. For example
I have a Posts with two associated model Author and Editor. So I need to find all posts where the Author.name or Editor.name is John Doe

I do next:

const {Sequelize, Op} = require('sequelize');
...
Posts.findAndCountAll({
      offset,
      limit: qty,
      include: [
           {
                model: Author,
                as: 'author',
                attributes: [ 'id', 'firstName', 'lastName', 'email' ],
                where: Sequelize.where(
                  Sequelize.fn("concat", Sequelize.fn('lower', Sequelize.col("author.firstName")), ' ', Sequelize.fn('lower', Sequelize.col("author.lastName"))),
                  {
                    [Op.like]: `%${search.toLowerCase()}%`,
                  },
                );
                or: true,
            },
            {
                model: Editor,
                as: 'editor',
                attributes: [ 'id', 'firstName', 'lastName', 'email' ],
                where: Sequelize.where(
                  Sequelize.fn("concat", Sequelize.fn('lower', Sequelize.col("editor.firstName")), ' ', Sequelize.fn('lower', Sequelize.col("editor.lastName"))),
                  {
                    [Op.like]: `%${search.toLowerCase()}%`,
                  },
                );
                or: true,
            },
      ],
});

What was unclear/insufficient/not covered in the documentation

According to this
https://github.com/sequelize/sequelize/blob/3e5b8772ef75169685fc96024366bca9958fee63/lib/model.js#L1302
I assume that [options.include[].or=false] should allow me to get all the Posts where the author or editor's name equals the searched name.

Can you help me to understand (with example if possible) how to do that in the right way?
The current result gives me the wrong data.

Thanks.

Start by reproducing the Posts.findAndCountAll query with the Author and Editor includes, then inspect the linked lib/model.js section for include[].or behavior. Compare the returned posts and count with the expected records where either associated name matches, and document a confirmed reproduction or the required correction.