<!-- This example is for: com.example.myapplication://auth_callback -->
<!-- Change it to your own url -->
<!-- TO HERE -->
Step 4: Call Cotter's Login function
To open up Cotter's Login screen, you can either have your user input their email or phone number inside Cotter's screen, or you can provide a text input where your users can enter their email / phone, and you can pass that to Cotter's screen.
a) To login and enter the email or phone number in Cotter's window: