Add provider configurations

src/main/resources/application.yml

@@ -3,8 +3,8 @@ server:
 
 clients:
   stock:
-    url: https://api.tiingo.com/tiingo
-    key: 5fa305fd07c632b556f9b25904b27f6d53091ae2
+    url: ${provider:}
+    key: ${key:}
 
 spring:
   data: