diff --git a/app/src/main/java/com/example/nemophila/LoginActivity.java b/app/src/main/java/com/example/nemophila/LoginActivity.java
index cd63a63..6446c87 100644
--- a/app/src/main/java/com/example/nemophila/LoginActivity.java
+++ b/app/src/main/java/com/example/nemophila/LoginActivity.java
@@ -9,7 +9,9 @@
 import android.widget.TextView;
 
 import com.example.nemophila.entities.Account;
+import com.example.nemophila.entities.AccountJson;
 import com.example.nemophila.resources.AccountsRest;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 
 import retrofit2.Call;
 import retrofit2.Callback;
@@ -17,6 +19,7 @@
 import retrofit2.Retrofit;
 import retrofit2.converter.jackson.JacksonConverterFactory;
 
+@JsonIgnoreProperties(ignoreUnknown=true)
 public class LoginActivity extends AppCompatActivity {
 
     private Retrofit retrofit;
@@ -43,11 +46,11 @@
                 String pw = editpw.getText().toString();
 
                 // 通信
-                Call<Account> call = AccountsRest.getAccounts(uid,pw);
+                Call<AccountJson> call = AccountsRest.getAccounts(uid,pw);
 
-                call.enqueue (new Callback<Account>() {
+                call.enqueue (new Callback<AccountJson>() {
                     @Override
-                    public void onResponse(Call<Account> call, Response<Account> response) {
+                    public void onResponse(Call<AccountJson> call, Response<AccountJson> response) {
                         if (response.isSuccessful()) {
                             System.out.println("通信成功:changeBelongsAndMaster");
                             Intent intent = new Intent(LoginActivity.this,MainActivity.class);
@@ -56,15 +59,16 @@
                             System.out.println("通信可能：changeBelongsAndMaster: " + response.code());
                                 if (response.code() == 500){
                                     ((TextView) findViewById(R.id.textView)).setText("Invalid UserID or Password");
-                                }else if (response.code() == 404){
+                                } else if (response.code() == 404){
                                     ((TextView) findViewById(R.id.textView)).setText("Login failed. Please enter the correct credentials.");
                                 }
                         }
                     }
 
                     @Override
-                    public void onFailure(Call<Account> call, Throwable t) {
+                    public void onFailure(Call<AccountJson> call, Throwable t) {
                         System.out.println("通信失敗:changeBelongsAndMaster");
+                        System.out.println(t);
                     }
                 });
             }
diff --git a/app/src/main/java/com/example/nemophila/SignUpActivity.java b/app/src/main/java/com/example/nemophila/SignUpActivity.java
index 9a412a6..0b1aa70 100644
--- a/app/src/main/java/com/example/nemophila/SignUpActivity.java
+++ b/app/src/main/java/com/example/nemophila/SignUpActivity.java
@@ -9,6 +9,7 @@
 import android.widget.TextView;
 
 import com.example.nemophila.entities.Account;
+import com.example.nemophila.entities.AccountJson;
 import com.example.nemophila.resources.AccountsRest;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 
@@ -17,6 +18,7 @@
 import retrofit2.Response;
 import retrofit2.Retrofit;
 import retrofit2.converter.jackson.JacksonConverterFactory;
+
 @JsonIgnoreProperties(ignoreUnknown=true)
 public class SignUpActivity extends AppCompatActivity{
 
@@ -44,11 +46,11 @@
                 String pw = editpw.getText().toString();
 
                 // 通信
-                Call<Account> call = AccountsRest.createAccounts(name,pw);
+                Call<AccountJson> call = AccountsRest.createAccounts(name,pw);
 
-                call.enqueue(new Callback<Account>() {
+                call.enqueue(new Callback<AccountJson>() {
                     @Override
-                    public void onResponse(Call<Account> call, Response<Account> response) {
+                    public void onResponse(Call<AccountJson> call, Response<AccountJson> response) {
                         if (response.isSuccessful()) {
                             System.out.println("通信成功:changeBelongsAndMaster");
                             Intent intent = new Intent(SignUpActivity.this,MainActivity.class);
@@ -64,8 +66,9 @@
                     }
 
                     @Override
-                    public void onFailure(Call<Account> call, Throwable t) {
+                    public void onFailure(Call<AccountJson> call, Throwable t) {
                         System.out.println("通信失敗:changeBelongsAndMaster");
+                        System.out.println(t);
                     }
                 });
             }
diff --git a/app/src/main/java/com/example/nemophila/entities/Account.java b/app/src/main/java/com/example/nemophila/entities/Account.java
index 9ebbf12..e96a2ce 100644
--- a/app/src/main/java/com/example/nemophila/entities/Account.java
+++ b/app/src/main/java/com/example/nemophila/entities/Account.java
@@ -1,6 +1,7 @@
 package com.example.nemophila.entities;
 
 import java.util.HashMap;
+import java.util.Map;
 
 public class Account {
     private String name;
@@ -43,4 +44,10 @@
     public void setPosts(HashMap<String, Post> posts) {
         this.posts = posts;
     }
+
+    public Account(AccountJson aj){
+        this.name = aj.getName();
+        this.id = aj.getId();
+        this.token = aj.getToken();
+    }
 }
diff --git a/app/src/main/java/com/example/nemophila/resources/AccountsRest.java b/app/src/main/java/com/example/nemophila/resources/AccountsRest.java
index 3d57bc1..fb95de5 100644
--- a/app/src/main/java/com/example/nemophila/resources/AccountsRest.java
+++ b/app/src/main/java/com/example/nemophila/resources/AccountsRest.java
@@ -3,6 +3,7 @@
 //import android.accounts.Account;
 
 import com.example.nemophila.entities.Account;
+import com.example.nemophila.entities.AccountJson;
 import com.example.nemophila.entities.Post;
 
 import java.util.Collection;
@@ -24,7 +25,7 @@
 
     @FormUrlEncoded
     @POST("accounts")
-    Call<Account> createAccounts(
+    Call<AccountJson> createAccounts(
             @Field("name") String name,
             @Field("pw") String pw
     );
@@ -41,7 +42,7 @@
 
     @FormUrlEncoded
     @POST("accounts/{uid}/login")
-    Call<Account> getAccounts(
+    Call<AccountJson> getAccounts(
             @Path("uid") String uid,
             @Field("pw")String pw
     );