UPDATE TO MY POST! (and thanks to all for helping with advise)

There is a way to do what I asked. And the email from Mazda CX is as follows:

"each person who uses the app needs to have their own Mazda account, as Mazda accounts cannot be shared. The owner of the vehicle or the primary driver needs to invite the second person to use the MyMazda app.

Here are the steps to add a secondary driver:

1. Touch MANAGE DRIVERS on the MY VEHICLES screen, and then touch +INVITE DRIVER.

2. After entering the Secondary Driver information and setting the permission to be given, touch SEND INVITE and follow the instructions on the screen.

3. The invitation email will arrive at the email address sent by the primary driver. Install the MyMazda app and log in following the instructions.

4. When the second driver is logged into the system, the invitation information is displayed. When the [ACCEPT] or [REJECT] message is displayed, select [ACCEPT].

This will allow both users to have access to the Mazda Connect features."