use session.Store interface instead of FileStore

app/rest/auth/middleware.go

@@ -29,7 +29,7 @@ var devUser = store.User{
 }
 
 // Auth middleware adds auth from session and populates user info
-func Auth(sessionStore *sessions.FilesystemStore, admins []string, modes []Mode) func(http.Handler) http.Handler {
+func Auth(sessionStore sessions.Store, admins []string, modes []Mode) func(http.Handler) http.Handler {
 
 	inModes := func(mode Mode) bool {
 		for _, m := range modes {

app/rest/server.go

@@ -32,7 +32,7 @@ type Server struct {
 	DataService   store.Service
 	Admins        []string
 	AuthProviders []auth.Provider
-	SessionStore  *sessions.FilesystemStore
+	SessionStore  sessions.Store
 	Exporter      migrator.Exporter
 	Cache         common.LoadingCache
 	DevMode       bool