Looking for logging into the Line V2 site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Line V2 site. After that you can login as usual with your login credentials.
https://qiita.com/KEINOS/items/dfe79bc3923fa79e3d1c
https://qiita.com/furuth/items/6df4334c3821ffc69d9c
https://developers.line.biz/en/docs/line-login/web/integrate-line-login-v2/
https://developers.line.biz/en/docs/line-login/web/integrate-line-login/
https://ml-fl.com/develop/line-login-v2-1
https://teratail.com/questions/122383
http://humming-bird.info/linebot/line-login-v2-chatbot/
https://medium.com/linedevth/line-login-version-2-1-104cd32562c5
https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q12182856037
https://github.com/kamiokan/LineLoginV2.1PHP
http://milk0824.hatenadiary.jp/entry/2016/04/08/021052
https://github.com/line/line-sdk-starter-android-v2/issues/19
https://github.com/line/line-login-starter/blob/master/src/main/java/com/linecorp/sample/login/infra/line/api/v2/LineAPI.java