Raise UserError for Eleven Labs credits error

recipes/TextToSpeech.py

@@ -1,4 +1,3 @@
-import datetime
 import json
 import time
 import typing
@@ -12,6 +11,7 @@
 from daras_ai.image_input import upload_file_from_bytes, storage_blob_for
 from daras_ai_v2 import settings
 from daras_ai_v2.base import BasePage
+from daras_ai_v2.exceptions import UserError
 from daras_ai_v2.gpu_server import GpuEndpoints, call_celery_task_outfile
 from daras_ai_v2.loom_video_widget import youtube_video
 from daras_ai_v2.text_to_speech_settings_widgets import (
@@ -257,13 +257,16 @@ def run(self, state: dict):
 
             case TextToSpeechProviders.ELEVEN_LABS:
                 xi_api_key, is_custom_key = self._get_elevenlabs_api_key(state)
-                assert (
+                if not (
                     is_custom_key
                     or self.is_current_user_paying()
                     or self.is_current_user_admin()
-                ), """
+                ):
+                    raise UserError(
+                        """
                     Please purchase Gooey.AI credits to use ElevenLabs voices <a href="/account">here</a>.
                     """
+                    )
 
                 voice_model = self._get_elevenlabs_voice_model(state)
                 voice_id = self._get_elevenlabs_voice_id(state)