[Abagail]

There's definitely pros and cons to that. One of the main pros are: security and constant maintance on ******/GitHub/whatevers end, you can expect it to be mostly secure; less work for you, implement the API and you're done. Cons: you don't have access to their data like you would maintaining a database, you can't easily reset their password if they lose that account (you'd have to change the account the data is associated with completely). It's less freedom basically, although similarly with pros, not having data means that their data is secured in the case your own system/database is breached.