http://localhost:8080/admin/authorize?client_id=<<クライアントID>>&redirect_uri=http%3A%2F%2F<<railsクライアントサーバ>>%3A3000%2Fusers%2Fauth%2Feccube%2Fcallback&response_type=code&state=<<ランダム文字列>>

Access to XMLHttpRequest at 'http://localhost:8080/admin/authorize?client_id=272e6339f4feff9d276485fdf7f6&redirect_uri=http%3A%2F%2F192.168.24.9%3A3000%2Fusers%2Fauth%2Feccube%2Fcallback&response_type=code&state=6fa7d2c3fd03b7f41667a942fb41cf3e754d01acca91d94d' (redirected from 'http://192.168.24.9:3000/users/auth/eccube') from origin 'http://192.168.24.9:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.