attempt to fix issue where race condition can happen

LeStorage/ApiCallCollection.swift

@@ -216,7 +216,7 @@ actor ApiCallCollection<T: Storable>: SomeCallCollection {
 
     /// Returns an APICall instance for the Storable [instance] and an HTTP [method]
     /// The method updates existing calls or creates a new one
-    fileprivate func _callForInstance(_ instance: T, method: HTTPMethod) throws -> ApiCall<T>? {
+    fileprivate func _callForInstance(_ instance: T, method: HTTPMethod) async throws -> ApiCall<T>? {
 
         if let existingCall = self.items.first(where: { $0.dataId == instance.stringId }) {
             switch method {
@@ -293,7 +293,7 @@ actor ApiCallCollection<T: Storable>: SomeCallCollection {
 
     /// Initiates the process of sending the data with the server
     fileprivate func _synchronize<V: Decodable>(_ instance: T, method: HTTPMethod) async throws -> V? {
-        if let apiCall = try self._callForInstance(instance, method: method) {
+        if let apiCall = try await self._callForInstance(instance, method: method) {
             self._prepareCall(apiCall: apiCall)
             return try await self._executeApiCall(apiCall)
         } else {