This is a toggle button. There should however be two different texts Sign in and Sign up.
Solution 1 :
Problem :
I’ll tell you right away that I’m new to this.
Comments
Comment posted by YuliiaZ
it’s toggle-button. just google it and you’ll find lot’s of different implementations
Comment posted by Heretic Monkey
Usually the text differs between the two choices of a toggle-button, though…
Comment posted by n1ksid
@YuliiaZ thank you very much