in auth/src/main/java/com/google/firebase/quickstart/AuthSnippets.java [54:68]
public static void createUser() throws InterruptedException, ExecutionException {
// [START create_user]
CreateRequest request = new CreateRequest()
.setEmail("user@example.com")
.setEmailVerified(false)
.setPassword("secretPassword")
.setPhoneNumber("+11234567890")
.setDisplayName("John Doe")
.setPhotoUrl("http://www.example.com/12345678/photo.png")
.setDisabled(false);
UserRecord userRecord = FirebaseAuth.getInstance().createUserAsync(request).get();
System.out.println("Successfully created new user: " + userRecord.getUid());
// [END create_user]
}