Do not synchronize by default?

[Thooto]

I'm submitting a...

[ ] Regression 
[ ] Bug report
[x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Not explicitely providing the synchronize: false option to the module calls the sequelize.sync() method which can alter a database in unexpected ways.

Expected behavior

Not explicitely providing the synchronize option shouldn't call the sequelize.sync() method.

What is the motivation / use case for changing the behavior?

I believe having the synchronize option enabled by default can be quite unforgiving if forgotten or omitted as this isn't a sequelize default behaviour (you have to explicitely call sequelize.sync()) and would be safer for projects relying on another database syncing mechanism (migrations, etc.).

Also the documentation doesn't appear really clear to me (keeping both original sync option and the new synchronize option).

Thanks for the consideration!

[cojack]

It's still related?