docs: Update connection-approval.md (Unity-Technologies#366)

Give clarity what namespaces need to be included

docs/_docs/getting-started/connection-approval.md

@@ -7,6 +7,9 @@ During every new connection the MLAPI performs a handshake on top of the one(s)
 
 However, when ConnectionApproval is true you are also required to provide a callback where you put your approval logic inside. (Server only) Example:
 ```csharp
+using MLAPI;
+using MLAPI.Spawning;
+
 private void Setup() 
 {
     NetworkingManager.Singleton.ConnectionApprovalCallback += ApprovalCheck;
@@ -31,6 +34,8 @@ private void ApprovalCheck(byte[] connectionData, ulong clientId, MLAPI.Networki
 ### Connection data
 The connectionData parameter is any custom data of your choice that the client should send to the server. Usually, this should be some sort of ticket, room password or similar that will decide if a connection should be approved or not. The connectionData is specified on the Client side in the NetworkingConfig supplied when connecting. Example:
 ```csharp
+using MLAPI;
+
 NetworkingManager.Singleton.NetworkConfig.ConnectionData = System.Text.Encoding.ASCII.GetBytes("room password");
 NetworkingManager.Singleton.StartClient();
 ```
@@ -45,4 +50,4 @@ The MLAPI uses a callback system in order to allow for external validation. For
 If connection approval is enabled. Any messages sent before a connection is setup are silently ignored.
 
 #### Connection Data
-If Encryption is enabled, the connection handshake with the buffer will be encrypted AND authenticated. (AES-256 encryption and HMAC-SHA-256 authentication). Please note that if the key exchange is not signed, a man in the middle attack can be done. If you plan on sending authentication tokens such as steam tickets. It's strongly suggested that you sign the handshake.
+If Encryption is enabled, the connection handshake with the buffer will be encrypted AND authenticated. (AES-256 encryption and HMAC-SHA-256 authentication). Please note that if the key exchange is not signed, a man in the middle attack can be done. If you plan on sending authentication tokens such as steam tickets. It's strongly suggested that you sign the handshake.