refactor: instance are in unrecoverable state instead of error

To avoid confusion between error from a call or network.
Instance has an Unrecoverable state instead of Error.

app/http/routes/models/dynamic_request.go

@@ -0,0 +1,12 @@
+package models
+
+import (
+	"time"
+)
+
+type DynamicRequest struct {
+	Names           []string
+	DisplayName     string
+	Theme           string
+	SessionDuration time.Duration
+}