Refactor NetworkRequest class

Add followUser and unfollowUser methods to TwitchAccount

src/providers/twitch/PartialTwitchUser.hpp

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <QObject>
+#include <QString>
+
+#include <functional>
+
+namespace chatterino {
+
+// Experimental class to test a method of calling APIs on twitch users
+class PartialTwitchUser
+{
+    PartialTwitchUser() = default;
+
+    QString username_;
+    QString id_;
+
+public:
+    static PartialTwitchUser byName(const QString &username);
+    static PartialTwitchUser byId(const QString &id);
+
+    void getId(std::function<void(QString)> successCallback, const QObject *caller = nullptr);
+};
+
+}  // namespace chatterino