user authentication structure in place

db/main.go

@@ -15,10 +15,10 @@ func InitDBConn(conf *util.Config) (*DBConn, error) {
 	if err != nil {
 		return nil, err
 	}
-	return &DBConn{ hot, cold }, nil
+	return &DBConn{hot, cold}, nil
 }
 
 type DBConn struct {
-	Hot *db_hot.DBHotConn
+	Hot  *db_hot.DBHotConn
 	Cold *db_cold.DBColdConn
 }