Looking for logging into the Salesforce Flow 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 Salesforce Flow site. After that you can login as usual with your login credentials.
https://help.salesforce.com/apex/HTViewHelpDoc%3Fid%3Dsecurity_login_flow.htm
https://developer.salesforce.com/docs/atlas.en-us.securityImplGuide.meta/securityImplGuide/security_login_flow_examples.htm
https://help.salesforce.com/apex/HTViewHelpDoc%3Fid%3Dsecurity_login_flow_create.htm
https://www.youtube.com/watch%3Fv%3DgYes8OLAc-k
https://www.youtube.com/watch%3Fv%3DnqhSb_saQmA
https://medium.com/%40nialljpmurphy/how-to-use-login-flows-with-salesforce-community-for-terms-and-conditions-acceptance-77228405c01b
https://automationchampion.com/tag/login-flow-example/
http://www.google.ie/url?url=http://www.asagarwal.com/enable-disable-users-to-login-to-salesforce-using-login-flow/
https://www.slideshare.net/developerforce/advanced-uses-of-salesforces-login-flows
https://www.jitendrazaa.com/blog/salesforce/how-to-use-login-flow-in-salesforce/
https://www.sfdcstuff.com/2017/04/login-flows-to-display-important.html
https://salesforce.stackexchange.com/questions/203199/login-flows-salesforce-with-ie11%3Frq%3D1
https://salesforcesidekick.com/2015/10/16/understanding-login-flows-default-variables/