Implement initial login functionality

internal/dis/component/auth/auth.go

@@ -0,0 +1,23 @@
+package auth
+
+import (
+	"sync"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/sql"
+	"github.com/gorilla/sessions"
+)
+
+type Auth struct {
+	component.Base
+	Dependencies struct {
+		SQL *sql.SQL
+	}
+
+	storeOnce sync.Once
+	store     sessions.Store
+}
+
+var (
+	_ component.Routeable = (*Auth)(nil)
+)