diff --git a/app/src/main/java/com/example/nemophila/Nemophila.java b/app/src/main/java/com/example/nemophila/Nemophila.java
index 61ae16c..6b8c2be 100644
--- a/app/src/main/java/com/example/nemophila/Nemophila.java
+++ b/app/src/main/java/com/example/nemophila/Nemophila.java
@@ -18,21 +18,21 @@
     public String getName() {
         if(name == null){
             SharedPreferences preferences = getSharedPreferences("prefData", MODE_PRIVATE);
-            name = preferences.getString("name", "");
+            name = preferences.getString("name", null);
         }
         return name;
     }
     public String getUid() {
         if(uid == null){
             SharedPreferences preferences = getSharedPreferences("prefData", MODE_PRIVATE);
-            uid = preferences.getString("uid", "");
+            uid = preferences.getString("uid", null);
         }
         return uid;
     }
     public String getToken() {
         if(token == null){
             SharedPreferences preferences = getSharedPreferences("prefData", MODE_PRIVATE);
-            token = preferences.getString("token", "");
+            token = preferences.getString("token", null);
         }
         return token;
     }