Add Refresh Middleware

[pfvatterott]

Middleware that refreshes the user's information.

Initiate by adding this to your Program.cs:

using PropelAuth.Middleware;
app.UseTokenRefresh(
    authUrl: "{YOUR_AUTH_URL}",
    clientId: "{YOUR_CLIENT_ID}",
    clientSecret: "{YOUR_CLIENT_SECRET}"
);

Currently the middleware refreshes the access token and user information on the next request after 10 minutes. You can update the line return jwt.ValidTo <= DateTime.UtcNow.AddMinutes(20); to configure this.

[andrew-propelauth]

Removed in favor of #10