I am trying to set a user from my custom django signup form based on what option they select from a RadioButton

Question

My forms.py

users = [ ('client', 'Client'), ('customer', 'Customer'), ]

class CustomSignUpForm(SignupForm):

    Register_as = forms.ChoiceField(choices=users, widget=forms.RadioSelect)

    def save(self, request):
        if CustomSignUpForm.Register_as.widget == 'client':
            user = super(CustomSignUpForm, self).save(request)
            user.is_client = True
            user.save()
            return user
        if CustomSignUpForm.Register_as.widget == 'customer':
            user = super(CustomSignUpForm, self).save(request)
            user.is_customer = True
            user.save()
            return user

But after running the code, i get this error

AttributeError at /accounts/signup/ type object 'CustomSignUpForm' has no attribute 'Register_as'

Request Method: POST

Request URL: http://localhost:8000/accounts/signup/

Django Version: 3.2.5

Exception Type: AttributeError

Exception Value:type object 'CustomSignUpForm' has no attribute 'Register_as'