Added some functionality to the accountPopup (#117)

* Added some buttons.

* Added some more functionality.

* Finished adding button functionality.

* Implemented @fourtf's suggestions.

src/twitch/twitchuser.cpp

@@ -1,4 +1,5 @@
 #include "twitchuser.hpp"
+#include "util/urlfetch.hpp"
 
 namespace chatterino {
 namespace twitch {
@@ -22,6 +23,16 @@ const QString &TwitchUser::getOAuthToken() const
     return this->_oauthToken;
 }
 
+const QString &TwitchUser::getUserId() const
+{
+    return this->_userId;
+}
+
+void TwitchUser::setUserId(const QString &id)
+{
+    this->_userId = id;
+}
+
 bool TwitchUser::isAnon() const
 {
     return this->_isAnon;