correct credential order

src/main/java/sensor2graph/Main.java

@@ -81,8 +81,8 @@ public class Main {
 			InfluxDBClientOptions.builder()
                 .url(Main.influxdb_uri)
                 .authenticateToken(String.format("%s:%s",
-					System.getenv("SENSOR2GRAPH_INFLUXDB_PASS"),
-					System.getenv("SENSOR2GRAPH_INFLUXDB_USER")
+					System.getenv("SENSOR2GRAPH_INFLUXDB_USER"),
+					System.getenv("SENSOR2GRAPH_INFLUXDB_PASS")
 				).toCharArray())
                 .bucket(Main.influxdb_database_name)
                 .org("-")