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https://www.codeproject.com/Questions/410259/Which-Design-pattern-is-best-for-Login
https://www.pinterest.com/amritbshahi/patterns-login/
https://softwareengineering.stackexchange.com/questions/376910/architecture-design-pattern-for-login-signup
https://www.mockplus.com/blog/post/sign-up-login-design-practices
https://stackoverflow.com/questions/15449859/is-there-any-design-pattern-for-login
https://www.quora.com/What-are-the-best-design-pattern-for-a-user-login
https://ieeexplore.ieee.org/iel7/7589474/7724213/07724414.pdf
https://www.theserverside.com/discussions/thread/8496.html
http://ui-patterns.com/collection/login-forms
https://www.patternfly.org/pattern-library/application-framework/login-page/
https://xamarinhelp.com/login-design-pattern/
http://www.welie.com/patterns/showPattern.php?patternID=login
http://www.uxforthemasses.com/login-page/