Can't create account without Facebook or Google – Ingress Prime Review

When I try to sign up, the only options presented are "create an account with Facebook" or "create an account with Google." I don't want to increase my reliance on either of those companies, and I don't want to give Niantic my social media information. Why is there no option to create an account with an email and password?
Review by BlahQ1248111622 on Ingress Prime.