Save access token to session and re-direct to admin page
$self->session->{access_token} = $res->json->{access_token};
$self->redirect_to('/admin');
}
else {
# Authentication or OAuth2 failure,
header && $header eq 'XMLHttpRequest' ) {
$self->app->log->debug( "AJAX / JSON Response triggered!" );
$self->render_json({
dyncontent => $self->stash( 'content' ),
headline => $self->stash(