mapStores returns undefined on vue2

[Archer-Thane]

Hey there. I want to use pinia along side vue 2 and options api.
So I followed the instructions and do this:

and then make a file for the store putting logic there:

finally call it inside my component using ...mapStores

but then it returns me undefined. can any one help? thanks alot

[mkidsc1603]

this.useRegisterStore => this.registerStore or this.register ?

I suggested that file's name same as store name.

[posva]

yes, it's this.registerStore by default: https://pinia.vuejs.org/api/modules/pinia.html#mapstores