Can I make commit's and dispatches form methodes or hooks?

Question

Hello i'm looking for a way to make the mutation using onMounted in one of my components. For example:

mutation:{
      letPrintSth(){
        console.log("hello i'm in vuex");
      }
}

onMounted:{()=>{
   this.$store.commit('letPrintSth') 
}}

but this way it throw err

• Property '$store' does not exist on type 'void'.

Can someone show me the proper way to do this?