Ensure we have a valid token length.

Disable typing indicator messages on group threads.

SignalServiceKit/src/Loki/API/LokiGroupChatAPI.swift

@@ -55,7 +55,7 @@ public final class LokiGroupChatAPI : NSObject {
     }
     
     internal static func getToken() -> Promise<String> {
-        guard let token = storage.dbReadConnection.string(forKey: serverURL, inCollection: tokenCollection) else {
+        guard let token = storage.dbReadConnection.string(forKey: serverURL, inCollection: tokenCollection), token.count > 0 else {
             return fetchToken().then { submitToken($0) }.map { token -> String in
                 storage.dbReadWriteConnection.setObject(token, forKey: serverURL, inCollection: tokenCollection)
                 return token

SignalServiceKit/src/Util/TypingIndicators.swift

@@ -322,6 +322,11 @@ public class TypingIndicatorsImpl: NSObject, TypingIndicators {
             guard delegate.areTypingIndicatorsEnabled() else {
                 return
             }
+            
+            // Disable typing indicators on public group chats
+            guard !thread.isGroupThread() else {
+                return
+            }
 
             let message = TypingIndicatorMessage(thread: thread, action: action)
             messageSender.sendPromise(message: message).retainUntilComplete()