Added refresh token endpoint

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

@@ -1,6 +1,7 @@
 package com.plannaplan.entities;
 
 import java.sql.Timestamp;
+import java.util.UUID;
 import java.util.concurrent.TimeUnit;
 
 import javax.persistence.Entity;
@@ -28,6 +29,7 @@ public class User {
     private String usosId;
     private UserRoles role;
     private String token;
+    private String refreshToken;
     private Timestamp tokenUsageDate;
 
     public User() {
@@ -105,6 +107,13 @@ public class User {
         return token;
     }
 
+    /**
+     * @return token needed to call refresh token after it expired
+     */
+    public String getRefreshToken() {
+        return refreshToken;
+    }
+
     /**
      * token seter. Sets token and automaticly set time when was set
      * 
@@ -113,6 +122,7 @@ public class User {
     public void setToken(String token) {
         this.tokenUsageDate = new Timestamp(System.currentTimeMillis());
         this.token = token;
+        this.refreshToken = UUID.randomUUID().toString();
     }
 
     /**