feat: add SCIM provisioning via Okta (#4132)

Co-authored-by: Ben Potter <ben@coder.com>

coderd/httpapi/httpapi.go

@@ -75,6 +75,12 @@ func InternalServerError(rw http.ResponseWriter, err error) {
 	})
 }
 
+func RouteNotFound(rw http.ResponseWriter) {
+	Write(rw, http.StatusNotFound, codersdk.Response{
+		Message: "Route not found.",
+	})
+}
+
 // Write outputs a standardized format to an HTTP response body.
 func Write(rw http.ResponseWriter, status int, response interface{}) {
 	buf := &bytes.Buffer{}