AccountManager mAccountManager;
// [...]
Account account = new Account("myEmail@gmail.com", "com.google");
// same with professional email managed by Google as myEmail@myDomain.com
// real code recovers accounts with mAccountManager.getAccountsByType("com.google")
mAccountManager = AccountManager.get(getBaseContext());
mAccountManager.getAuthToken(account, "oauth2:https://www.googleapis.com/auth/userinfo.email", null, MyActivity.this, new AccountManagerCallback<Bundle>() {
    @Override
    public void run(AccountManagerFuture<Bundle> accountManagerFuture) {
        try {
            String token = accountManagerFuture.getResult().getString(AccountManager.KEY_AUTHTOKEN);
            // exception occurs here
            // [...]
        } catch (Exception e) {
            Log.e("account", "exception occurs", e);
        }
    }
}, null);

android.accounts.AuthenticatorException: UNREGISTERED_ON_API_CONSOLE
    at android.accounts.AccountManager.convertErrorToException(AccountManager.java:2024)
    at android.accounts.AccountManager.access$400(AccountManager.java:144)
    at android.accounts.AccountManager$AmsTask$Response.onError(AccountManager.java:1867)
    at android.accounts.IAccountManagerResponse$Stub.onTransact(IAccountManagerResponse.java:69)
    at android.os.Binder.execTransact(Binder.java:446)