Before you start: You'll need plenty of room for log storage and you should also be sure that you're using Postgres version 9.4 or newer.
wal_levelto "logical" in your database configuration.
Restart the server.
Create a dedicated Logical Replication slot.
You must create a dedicated replication slot for Alooma. If any other processes use this replication slot, you risk losing data.
Log into postgresSql as a superuser and, using the test_decoding plugin, create a logical replication slot named: alooma_replication_slot
SELECT pg_create_logical_replication_slot('alooma_replication_slot', 'test_decoding');
Grant the necessary replication permission to your user to enable reading the logical replication slot:
GRANT replication TO <user>;
Log in as the user and verify you can read from the logical replication slot:
SELECT count(*) FROM pg_logical_slot_peek_changes('alooma_replication_slot', null, null);
And that's it! You're all set to finish connecting to Postgres.