feat: replace all [null] with proper [] when marshaling json

constant.go

@@ -16,3 +16,9 @@ var (
 	private_ACKNOWLEDGE_RESPONSE_RAW_BODY     = []byte(fmt.Sprintf(`{"type":%d}`, DEFERRED_UPDATE_MESSAGE_RESPONSE_TYPE))
 	private_UNKNOWN_COMMAND_RESPONSE_RAW_BODY = []byte(fmt.Sprintf(`{"type":%d,"data":{"content":"Oh uh.. It looks like you tried to trigger (/) unknown command. Please report this bug to bot owner.","flags":64}}`, CHANNEL_MESSAGE_WITH_SOURCE_RESPONSE_TYPE))
 )
+
+// Those are used to replace seemingly empty slice into empty array after marsalling struct to json string.
+var (
+	private_REST_NULL_SLICE_FIND    []byte = []byte("[null]")
+	private_REST_NULL_SLICE_REPLACE []byte = []byte("[]")
+)

rest.go

@@ -80,11 +80,11 @@ func (rest *iRest) handleRequest(method string, route string, jsonPayload interf
 		request, err := http.NewRequest(
 			method,
 			DISCORD_API_URL+route,
-			bytes.ReplaceAll(
+			bytes.NewBuffer(bytes.ReplaceAll(
 				body,
 				private_REST_NULL_SLICE_FIND,
 				private_REST_NULL_SLICE_REPLACE,
-			),
+			)),
 		)
 
 		if err != nil {