Implemented hashing and checks the database if the username and password equals what is in the database

Added printGraphs function, should be working correctly, but think after 8 series a new series will pick a random series color

Added check for max 10 characters in input field, for sql injection security,...

See merge request mesji/bacheloroppgave_2022!46

Added check for max 10 characters in input field, for sql injection security, not printing error message to user yet tho

Eilerts branch

See merge request mesji/bacheloroppgave_2022!45