.Net Core authentication+session analysis paralysis

I actually didn't go through refresh keys as it wasn't straightforward and I was building the MVP and wanted to iterate quickly. Here is what I ended up doing:

When users login, I create token object with user details to be saved on local storage, I send value "loggedDate"/"issued" on the C# backend and "expires" in addition to access_token, I set the expires to maximum of 60 days.

You need to set the AccessTokenExpireTimeSpan to 60 days if you want users to be prompted to login again after 60 days.

// Create the response building a JSON object that mimics exactly the one issued by the default /Token endpoint
            JObject token = new JObject(
                new JProperty("userName", user.UserName),
                new JProperty("userId", user.Id),
                new JProperty("firstName", user.FirstName),
                new JProperty("lastName", user.LastName),
                new JProperty("access_token", accessToken),
                new JProperty("token_type", "bearer"),
                new JProperty("profilePicUrl", user.ProfilePicUrl),
                new JProperty("emailConfirmed", user.EmailConfirmed.ToString()),
                new JProperty("userRole", user.UserRole),
                new JProperty("doubleRole", user.DoubleRole.ToString()),
                new JProperty("phoneConfirmed", user.PhoneNumberConfirmed.ToString()),
                   new JProperty("expires",
                    currentUtc.Add(Startup.OAuthOptions.AccessTokenExpireTimeSpan)
                        .ToString("ddd, dd MMM yyyy HH:mm:ss 'GMT'"))
            );

Note: I am using Vuejs for frontend. The line below is triggered whenever a user goes from one route to another (or enters the site).

beforeEnter: (to, from, next) => {
auth.checkTokenExpiry()
}

the checkTokenExpirty function is defined below in my auth.js file:

checkTokenExpiry() {
/Checking if token has expired/
if (localStorage.getItem('access_token') != null) {
var loggedDate = moment(JSON.parse(localStorage.getItem('loggedDate')))
//JSON parse to get red of moment warning for ISO string datetime issues.
var currentDate = moment()
var difference = currentDate.diff(loggedDate, 'seconds')
if (difference >= localStorage.getItem('expires')) {
swal("Session Expired", "Your session expired, please login again to continue.", "info")
this.logout() <--- all you have to do is to delete the localStorage object.

        }
    }
},