feat: Authors feature backend (and upgraded deprecated mods)

api/middleware/requireSignedIn.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 
 	"github.com/go-chi/jwtauth/v5"
-	"github.com/lestrrat-go/jwx/v2/jwt"
+	"github.com/lestrrat-go/jwx/v3/jwt"
 )
 
 func RequireSignedIn(next http.Handler) http.Handler {