Many IDisposable fixes. GlobalNadeko won't have file watchers for creds. Wallet simplified

src/NadekoBot/Modules/Searches/_Common/StreamNotifications/Providers/PicartoProvider.cs

@@ -62,7 +62,7 @@ public class PicartoProvider : Provider
             {
                 http.DefaultRequestHeaders.Accept.Add(new("application/json"));
                 // get id based on the username
-                var res = await http.GetAsync($"https://api.picarto.tv/v1/channel/name/{login}");
+                using var res = await http.GetAsync($"https://api.picarto.tv/v1/channel/name/{login}");
 
                 if (!res.IsSuccessStatusCode)
                     continue;

src/NadekoBot/Modules/Searches/_Common/StreamNotifications/Providers/TrovoProvider.cs

@@ -59,7 +59,7 @@ If you are experiencing ratelimits, you should create your own application at: h
         // so there is no need for ratelimit checks atm
         try
         {
-            var res = await http.PostAsJsonAsync(
+            using var res = await http.PostAsJsonAsync(
                 $"https://open-api.trovo.live/openplatform/channels/id",
                 new TrovoRequestData()
                 {