Client - display client secret after creation

fittrackee_client/src/locales/en/oauth2.json

@@ -1,7 +1,8 @@
 {
   "ADD_A_NEW_APP": "Add a new OAuth2 application",
   "APP": {
-    "CLIENT_ID": "Client ID",
+    "CLIENT_ID": "Id",
+    "CLIENT_SECRET": "Secret",
     "DESCRIPTION": "Application description",
     "ISSUE_AT": "issue at",
     "NAME": "Application name",
@@ -14,6 +15,7 @@
     "URL": "Application URI"
   },
   "APP_DELETION_CONFIRMATION": "Are you sure you want to delete this app?",
+  "APP_CREATED_SUCCESSFULLY": "Application created successfully. Make sure to copy the secret now, it won't show up again.",
   "APPS_LIST": "OAuth2 applications",
   "DELETE_APP": "Delete application",
   "NEW_APP": "New OAuth App",