fix constructor

@@ -12,7 +12,8 @@ type InfluxClient struct {
   Db string
 }
 
-func (i *InfluxClient) CreateClient(db string, username string, password string, dbAddress string){
+func CreateClient(db string, username string, password string, dbAddress string) *InfluxClient {
+  i := InfluxClient {}
   i.Db = db
   i.Client, i.InfluxErr = influx.NewHTTPClient(influx.HTTPConfig{
     Addr:     dbAddress,
@@ -22,9 +23,10 @@ func (i *InfluxClient) CreateClient(db string, username string, password string,
   if i.InfluxErr != nil {
     panic(i.InfluxErr)
   }
+  return &i
 }
 
-func (i *InfluxClient) createPoint(tableName string, tags map[string]string, fields map[string]interface{}, timestamp time.Time) {
+func (i *InfluxClient) CreatePoint(tableName string, tags map[string]string, fields map[string]interface{}, timestamp time.Time) {
   bp, _ := influx.NewBatchPoints(influx.BatchPointsConfig{
     Database: i.Db,
     Precision: "s",