Token generation for new user

[lorezi]

The way token generation is been implemented at the moment is not efficient because a new user could be created without having a generated token.

I think the token generation implementation should be transactional (all or nothing operations)in the sense that a new user creation fails if token generation fails.

Transactional implementation saves us the stress of having users in our database and they don't have access to our application which then ensures data consistency and integrity.