Store user in vuex after login - vue.js

Question

I am trying to create login page. SO for this, I am making a call. After I get the response, I am storing cookie and with the cookie I am getting the user info. What I am trying to do is store this user info in Vuex store. Here is whole of my logic for this:
export default {
name: 'Login',
mounted() {
EventBus.$on(GENERAL_APP_CONSTANTS.Events.CheckAuthentication, () => {
this.authenticated = authHelper.validAuthentication();
if (this.authenticated) {
this.email = this.password = "";
this.authenticationFailed = false;
}
});
EventBus.$on(GENERAL_APP_CONSTANTS.Events.LoginFailed, () => {
this.authenticationFailed = true
});
},
data () {
return {
authenticated: false,
authenticationFailed: false,
email: '',
password: '',
rememberMe: false,
cookieName: "_token",
cookie: "",
cookieValue: "",
}
},
validations: {
email: {
required,
email,
},
password: {
required,
minLength: minLength(0)
},
},
methods: {
signIn: function () {
authHelper.signIn(this.email, this.password, () => {
this.$router.push({name: 'home'});
});
this.cookie = cookieHelper.getCookie(this.cookieName);
this.cookieValue = cookieHelper.getCookieValue(this.cookie);
this.storeUser();
},
storeUser: function () {
apiHelper.getRequest(
`/users/${cookieHelper.parseJwt(this.cookie).user_id}`,
(response) => {
this.$store.dispatch('storeUser', {
user: response.data,
})
}
)
},
}
}
So, as you see below, my user in Vuex store is still empty:
my mutation is:
export const STORE_USER = (state, {user}) => {
state.user = user;
}
my action is:
export const storeUser = ({commit}, {user}) => {
commit('STORE_USER', {user});
}
Could you have a look and let me know, where do you think I am making something wrong.