diff --git a/backend/src/graphql/directive/isAuthorized.ts b/backend/src/graphql/directive/isAuthorized.ts
index d72f19456..079e8e88c 100644
--- a/backend/src/graphql/directive/isAuthorized.ts
+++ b/backend/src/graphql/directive/isAuthorized.ts
@@ -2,9 +2,6 @@
 
 import { AuthChecker } from 'type-graphql'
 
-import CONFIG from '../../config'
-import { apiGet } from '../../apis/HttpRequest'
-
 import decode from '../../jwt/decode'
 import encode from '../../jwt/encode'
 
diff --git a/backend/src/graphql/model/User.ts b/backend/src/graphql/model/User.ts
index 08651ae17..5b7682e01 100644
--- a/backend/src/graphql/model/User.ts
+++ b/backend/src/graphql/model/User.ts
@@ -10,15 +10,17 @@ export class User {
   @PrimaryGeneratedColumn()
   id: number
   */
-  constructor(json: any) {
-    this.email = json.email
-    this.firstName = json.first_name
-    this.lastName = json.last_name
-    this.username = json.username
-    this.description = json.description
-    this.pubkey = json.public_hex
-    this.language = json.language
-    this.publisherId = json.publisher_id
+  constructor(json?: any) {
+    if (json) {
+      this.email = json.email
+      this.firstName = json.first_name
+      this.lastName = json.last_name
+      this.username = json.username
+      this.description = json.description
+      this.pubkey = json.public_hex
+      this.language = json.language
+      this.publisherId = json.publisher_id
+    }
   }
 
   @Field(() => String)
diff --git a/database/entity/0003-login_server_tables/LoginUserBackup.ts b/database/entity/0003-login_server_tables/LoginUserBackup.ts
index 0f8cf78a9..548a46408 100644
--- a/database/entity/0003-login_server_tables/LoginUserBackup.ts
+++ b/database/entity/0003-login_server_tables/LoginUserBackup.ts
@@ -9,6 +9,9 @@ export class LoginUserBackup extends BaseEntity {
   @Column({ type: 'text', name: 'passphrase', nullable: false })
   passphrase: string
 
+  @Column({ name: 'user_id', nullable: false })
+  userId: number
+
   @Column({ name: 'mnemonic_type', default: -1 })
   mnemonicType: number