The things I have done are:
1. Change my login password to my account
2. Deleted the phone as a key from the car.
Those are the only things I can think of initially. I typically don't log out of the app, as doing so would negate being able to easily access the car and lock/unlock it. That's why I'm unsure whether the app when opened will it access the car, or because I have changed the password and deleted it from the car it will deny access in any way. I especially don't want the location function to work.
Additionally info, the phone is a Android Samsung J7 Prime. It has the initial security of connecting the dots to access the user window. So, it is mildly secure, I assume someone can google a way to get past it.
Anyway, I lost the phone by accidentally leaving it in a shopping cart at Krogers. Didn't realize I didn't have my phone til I got home, about 10 minutes later. Went back to Krogers to see if it had been returned, no dice. I have assumed it is now lost and gone forever. This is as bad a losing your wallet. What's worse is I didn't enable any tracking app., so no way of locating it. In all the years of owning a cell phone I have never lost one, til now.