How to implement a label click event in pyqt5?

Question

User interface

Hello. Today I made an application that, at the beginning of the program, asks the user for a password (in a separate window), and when the button is pressed, it throws it further (if the login and password are correct). I placed the inscription (Registration) under the button, made it look like a link and started writing the code.

I wanted an event to be processed when I clicked on the inscription (a new window was opened for registration), but when I registered it self.registerButton.clicked.connect(self.register), I saw an errordef __init__():

AttributeError: 'QLabel' object has no attribute 'clicked'

Which event is responsible for clicking on the inscription or for clicking in general?