add extra_info_for_claims argument to the function that add claims

[WaleedMeselhy]

pass new argument (extra_info_for_claims) to the function that generate claims to add this argument to claims

[pep8speaks]

Hello @WaleedMeselhy! Thanks for submitting the PR.

• In the file flask_jwt_extended/jwt_manager.py, following are the PEP8 issues :

Line 446:91: E501 line too long (104 > 90 characters)

• In the file flask_jwt_extended/utils.py, following are the PEP8 issues :

Line 113:91: E501 line too long (93 > 90 characters)
Line 136:91: E501 line too long (98 > 90 characters)
Line 157:91: E501 line too long (92 > 90 characters)

[coveralls]

Coverage remained the same at 100.0% when pulling 1144f33 on WaleedMeselhy:master into 8ba49aa on vimalloc:master.

[vimalloc]

This isn't a bad idea, if I was rebuilding the library from scratch or introducing a new major version bump I could totally see adding this into the extension. As it stands though I don't think I want to merge this, it creates a breaking change in this extension which I think will cause more issues then it solves. You can put logic for when additional claims are needed directly in the user claims callback instead, and achieve functionally the same thing without having a breaking change in this library.

If you need additional state besides your user model to determine if additional claims are required, you can use the flask.g object to store them before the callback is hit, and access them in your callback function.