refactor: load Twitch emotes from Helix (#5239)

src/providers/twitch/TwitchUser.cpp

@@ -1,7 +1,7 @@
 #include "providers/twitch/TwitchUser.hpp"
 
+#include "debug/AssertInGuiThread.hpp"
 #include "providers/twitch/api/Helix.hpp"
-#include "util/RapidjsonHelpers.hpp"
 
 namespace chatterino {
 
@@ -12,4 +12,12 @@ void TwitchUser::fromHelixBlock(const HelixBlock &ignore)
     this->displayName = ignore.displayName;
 }
 
+void TwitchUser::update(const HelixUser &user) const
+{
+    assertInGuiThread();
+    assert(this->id == user.id);
+    this->name = user.login;
+    this->displayName = user.displayName;
+}
+
 }  // namespace chatterino