Guides and documentation

Python3

https://docs.python.org/release/3.6.5/tutorial/index.html

Flask

http://flask.pocoo.org/docs/0.12/

http://flask.pocoo.org/docs/0.12/quickstart/

https://blog.miguelgrinberg.com/

Bootstrap

https://getbootstrap.com/docs/4.0/getting-started/introduction/

https://www.tutorialspoint.com/bootstrap/bootstrap_quick_guide.htm

Javascript

https://developer.mozilla.org/bm/docs/Learn/Getting_started_with_the_web/JavaScript_basics

https://www.w3schools.com/jsref/default.asp

MySQL

https://dev.mysql.com/doc/refman/5.7/en/tutorial.html

https://www.tutorialspoint.com/mysql/index.htm

Flask Login

https://flask-login.readthedocs.io/en/latest/

https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-v-user-logins

Flask-bcrypt

https://flask-bcrypt.readthedocs.io/en/latest/

Flask-WTF

https://www.tutorialspoint.com/flask/flask_wtf.htm

WTForms

https://wtforms.readthedocs.io/en/stable/index.html

http://wtforms.simplecodes.com/docs/1.0.1/crash_course.html

MySQL.connector

https://dev.mysql.com/doc/connector-python/en/