Vuex

Hello,
I'm a c# backend developer and started to learn vue for one of my projects.
my task is very simple,
user logins(gets auth token) -> via getCustomerInfo -> set customerData
but i'm getting, unknown action type: getCustomerInfo.
When i google it, i get many answers but i'm not sure which to follow because each one declares another scenario :)

It's about almost 2 days, i started this, and i'm already in love with vue.
Wish i had a clear example to follow. I'm open to suggestions,
I bought lessons from https://www.vuemastery.com/, they are awesome but i'm not at the state where i should be, so im struggling.
Please, suggest me a clear, easy to follow guide..

Thank you :)