Is this what I need to do?

Lambdas/GetCharityTypes/Function.cs

@@ -34,9 +34,11 @@ private static async Task Main(string[] args)
         _connectionString = $"Server={_dbHost};Port={_dbPort};Database={_dbName};" +
                                   $"User={_dbUser};Password={authToken};SSL Mode=Required;";
 
+        Func<ILambdaContext, Task<string>> handler = FunctionHandler;
+
         // Use the source generator serializer
         await LambdaBootstrapBuilder.Create(
-            FunctionHandler,
+            handler,
             new SourceGeneratorLambdaJsonSerializer<CustomSerializer>()
         ).Build().RunAsync();
     }