Update documentation to reflect popup usage

[pschinis]

Hey thanks for making this package, really useful. But I ran into some issues implementing it at first because the docs are outdated and don't reflect how it works if you set usePopup to true. Namely it says the callback can only be used if responseMode is query but it's also used for the popup. redirectUri also isn't required if you're using the popup. And it'd also be nice to document the format for specifying multiple scopes (space separated list).

[patelmayankce]

Hi @pschinis, Sorry for missing information in the document.

I found one issue related to the usePopup option, which has been figured out in this new release.

If you will use the usePopup: true option, then the package doesn't require redirectURI Regarding callback, the package will trigger the callback function with data & error.

[Naveenhubino]

hi @patelmayankce , if i set popup option to true and remove redirectURI it takes localhost as redirectURI but am getting an error like invalid redirectURI. Is that it will be applicable only for hosted domain?