feat: валидация данных в виде модулей

app.R

@@ -31,6 +31,7 @@ global_options$set_global_options(
   shiny.host = "0.0.0.0"
   # enabled_schemes = "example_of_scheme"
 )
+global_options$check_and_init_scheme()
 
 # CHECK FOR PANDOC
 # TEMP ! NEED TO HANDLE
@@ -1186,7 +1187,7 @@ server <- function(input, output, session) {
       "exporting data to xlsx",
       "importing data from xlsx"
     ),
-    key = NULL,
+    key = NA,
     con
   ) {