I added the grant_handler contract as well as a factory for handlers. In addition I extended oauth2 exceptions middleware to support granttypeerror.
I added the code for implicit grant type success scenario as well as unit tests for it and mandatory missing parameters.
I added missing docstring for unsupported grant type exception/
I added support for controllers custom packages.
I added draft implementation for authorize endpoint with grant type validation.
I added login token validation into implicit grant handler.
I fixed a pylint warning into ouath2 controller.
I added the contracts and factory for exception formatters.
I implemented json exception formatter.
I correctly implemented form exception formatter.
I added the dummy formatter exception unit tests.
I correctly implemented the hash exception formatter.