Simplify disconnect

LeStorage/Store.swift

@@ -108,8 +108,8 @@ public class Store {
         self.settingsStorage.item.username = username
     }
     
-    public func disconnect() throws {
-        try self.service?.disconnect()
+    public func disconnect() {
+        try? self.service?.disconnect()
         self.settingsStorage.item.userUUIDString = nil
     }