Looking for logging into the Line Api 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 Api site. After that you can login as usual with your login credentials.
https://developers.line.biz/
https://medium.com/linedevth/line-login-version-2-1-104cd32562c5
https://www.line-community.me/contributors
https://github.com/line/line-login-starter
https://engineering.linecorp.com/en/blog/introducing-the-line-login-platform/
https://devcenter.heroku.com/articles/authentication
https://at.line.me/
https://qiita.com/stachibana/items/80f8daddfd98c63c7f0b
https://console.bluemix.net/docs/cli/login_federated_id.html
https://medium.freecodecamp.org/build-restful-api-with-authentication-under-5-minutes-using-loopback-by-expressjs-no-programming-31231b8472ca
https://docs.cloudfoundry.org/cf-cli/getting-started.html
https://stackoverflow.com/questions/36885050/line-application-login-api-auth2-not-working
https://itopstory.com/how-to-use-line-login-ios-sdk-4f890d37391a