init method
Will initate the ACME client.
The client will fetch the directories according to the given baseUrl and try to retreive the account information. Depending on createIfNotExists it will create a new account if none exists.
Implementation
Future<void> init() async {
// Validate data
validateData();
// Load directories
directories = await _getDirectories();
// Get Account
account = await getAccount(createIfnotExists: createIfNotExists);
}