final AccountManagement accountManagement = (AccountManagement)providerRegistry.retrieve(AccountManagement.class);
if (!accountManagement.verifyAccountExists(EntityImpl.parse("user1@vysper.org"))) {
accountManagement.addUser("user1@vysper.org", "password1");
}
if (!accountManagement.verifyAccountExists(EntityImpl.parse("user2@vysper.org"))) {
accountManagement.addUser("user2@vysper.org", "password1");
}
if (!accountManagement.verifyAccountExists(EntityImpl.parse("user3@vysper.org"))) {
accountManagement.addUser("user3@vysper.org", "password1");
}