refresh token

buisnesslogic/src/main/java/com/plannaplan/entities/User.java

@@ -165,7 +165,7 @@ public class User {
     public void setToken(String token) {
         this.tokenUsageDate = new Timestamp(System.currentTimeMillis());
         this.token = token;
-        this.refreshToken = UUID.randomUUID().toString();
+        this.refreshToken = this.refreshToken == null ? UUID.randomUUID().toString() : this.refreshToken;
     }
 
     /**