Merge pull request #667 from doccano/bugfix/login-logout-problem

Fix login/logout problem

frontend/services/auth.service.js

@@ -6,6 +6,7 @@ class AuthService {
   }
 
   postCredential(data) {
+    this.request.removeHeader()
     return this.request.post('/auth-token', data)
   }
 }