Test 'it is invalid without an email account' for admin_model on red
Test 'it is invalid without an email account' for admin_model on green
Test 'it is invalid without a password' for admin_model on red
Test 'it is invalid without a password' for admin_model on green
Test 'it does not allow duplicate emails' for admin_model on red
Test 'it does not allow duplicate emails' for admin_model on green