ignore unicode characters errors

+ add methods on settings.Keys to verify key !== empty string

app/settings.py

@@ -6,6 +6,7 @@ import sys
 from typing import Any
 
 from app import configs
+from app.logger import log
 
 join = os.path.join
 
@@ -239,3 +240,15 @@ class Keys:
         if IS_BUILD:
             cls.LASTFM_API = configs.LASTFM_API_KEY
             cls.POSTHOG_API_KEY = configs.POSTHOG_API_KEY
+
+        cls.verify_exists()
+
+    @classmethod
+    def verify_exists(cls):
+        if not cls.LASTFM_API:
+            log.error("ERROR: LASTFM_API_KEY not set in environment")
+            sys.exit(0)
+
+        if not cls.POSTHOG_API_KEY:
+            log.error("ERROR: POSTHOG_API_KEY not set in environment")
+            sys.exit(0)