Removal of C#8 features to get it to work with Unity 2019

Author: JohannesLoot

Runtime/Game/LootLockerGameServerAPI.cs

@@ -72,17 +72,17 @@ protected override void RefreshTokenAndCompleteCall(LootLockerServerRequest cach
                 });
             }
 
-            void CompleteCall(LootLockerServerRequest cacheServerRequest, Action<LootLockerResponse> OnServerResponse, LootLockerSessionResponse response)
+            void CompleteCall(LootLockerServerRequest newcacheServerRequest, Action<LootLockerResponse> newOnServerResponse, LootLockerSessionResponse response)
             {
                 if (response.success)
                 {
                     Dictionary<string, string> headers = new Dictionary<string, string>();
                     headers.Add("x-session-token", LootLockerConfig.current.token);
-                    cacheServerRequest.extraHeaders = headers;
-                    if (cacheServerRequest.retryCount < 4)
+                    newcacheServerRequest.extraHeaders = headers;
+                    if (newcacheServerRequest.retryCount < 4)
                     {
-                        SendRequest(cacheServerRequest, OnServerResponse);
-                        cacheServerRequest.retryCount++;
+                        SendRequest(newcacheServerRequest, newOnServerResponse);
+                        newcacheServerRequest.retryCount++;
                     }
                     else
                     {
@@ -91,7 +91,7 @@ void CompleteCall(LootLockerServerRequest cacheServerRequest, Action<LootLockerR
                         res.statusCode = 401;
                         res.Error = "Token Expired";
                         res.hasError = true;
-                        OnServerResponse?.Invoke(res);
+                        newOnServerResponse?.Invoke(res);
                     }
                 }
                 else
@@ -101,7 +101,7 @@ void CompleteCall(LootLockerServerRequest cacheServerRequest, Action<LootLockerR
                     res.statusCode = 401;
                     res.Error = "Token Expired";
                     res.hasError = true;
-                    OnServerResponse?.Invoke(res);
+                    newOnServerResponse?.Invoke(res);
                 }
             }
         }

Runtime/Game/Requests/WhiteLabelRequest.cs

@@ -35,17 +35,17 @@ public class LootLockerWhiteLabelSignupResponse : LootLockerResponse
         public int GameID { get; set; }
         public string Email { get; set; }
         public string CreatedAt { get; set; }
-        #nullable enable
-        public string? UpdatedAt { get; set; }
-        #nullable enable
-        public string? DeletedAt { get; set; }
-        #nullable enable
-        public string? ValidatedAt { get; set; }
+
+        public string UpdatedAt { get; set; }
+
+        public string DeletedAt { get; set; }
+
+        public string ValidatedAt { get; set; }
     }
 
     public class LootLockerWhiteLabelLoginResponse : LootLockerWhiteLabelSignupResponse
     {
-        public string? SessionToken { get; set; }
+        public string SessionToken { get; set; }
     }
 }
 
@@ -70,7 +70,7 @@ public static void WhiteLabelLogin(LootLockerWhiteLabelUserRequest input, Action
 
             LootLockerServerRequest.CallDomainAuthAPI(endPoint.endPoint, endPoint.httpMethod, json, ((serverResponse) =>
             {
-                LootLockerWhiteLabelLoginResponse? response = new LootLockerWhiteLabelLoginResponse();
+                LootLockerWhiteLabelLoginResponse response = new LootLockerWhiteLabelLoginResponse();
                 if (string.IsNullOrEmpty(serverResponse.Error) && serverResponse.text != null)
                 {
                     DefaultContractResolver contractResolver = new DefaultContractResolver
@@ -115,7 +115,7 @@ public static void WhiteLabelVerifySession(LootLockerWhiteLabelVerifySessionRequ
 
             LootLockerServerRequest.CallDomainAuthAPI(endPoint.endPoint, endPoint.httpMethod, json, ((serverResponse) =>
             {
-                LootLockerWhiteLabelVerifySessionResponse? response = new LootLockerWhiteLabelVerifySessionResponse();
+                LootLockerWhiteLabelVerifySessionResponse response = new LootLockerWhiteLabelVerifySessionResponse();
                 if (string.IsNullOrEmpty(serverResponse.Error) && serverResponse.text != null)
                 {
                     DefaultContractResolver contractResolver = new DefaultContractResolver
@@ -159,7 +159,7 @@ public static void WhiteLabelSignUp(LootLockerWhiteLabelUserRequest input, Actio
 
             LootLockerServerRequest.CallDomainAuthAPI(endPoint.endPoint, endPoint.httpMethod, json, ((serverResponse) =>
             {
-                LootLockerWhiteLabelSignupResponse? response = new LootLockerWhiteLabelSignupResponse();
+                LootLockerWhiteLabelSignupResponse response = new LootLockerWhiteLabelSignupResponse();
                 if (string.IsNullOrEmpty(serverResponse.Error) && serverResponse.text != null)
                 {
                     DefaultContractResolver contractResolver = new DefaultContractResolver
@@ -195,7 +195,7 @@ public static void WhiteLabelRequestPasswordReset(string email, Action<LootLocke
             var json = JsonConvert.SerializeObject(new { email });
             LootLockerServerRequest.CallDomainAuthAPI(endPoint.endPoint, endPoint.httpMethod, json, (serverResponse) =>
             {
-                LootLockerResponse? response = new LootLockerResponse
+                LootLockerResponse response = new LootLockerResponse
                 {
                     text = serverResponse.text,
                     success = serverResponse.success,
@@ -214,7 +214,7 @@ public static void WhiteLabelRequestAccountVerification(int userID, Action<LootL
             var json = JsonConvert.SerializeObject(new { user_id = userID });
             LootLockerServerRequest.CallDomainAuthAPI(endPoint.endPoint, endPoint.httpMethod, json, (serverResponse) =>
             {
-                LootLockerResponse? response = new LootLockerResponse
+                LootLockerResponse response = new LootLockerResponse
                 {
                     text = serverResponse.text,
                     success = serverResponse.success,