'Turns a code into an access token
**Example**::
FacebookAuthorization.convert_code(code)
:param code:
The code to convert
:param redirect_uri:
The redirect uri with which the code was requested
:returns: dict'

@classmethod
def convert_code(cls, code, redirect_uri='http://local.mellowmorning.com:8000/facebook/connect/'):

    kwargs = cls._client_info()
    kwargs['code'] = code
    kwargs['redirect_uri'] = redirect_uri
    response = cls.request('oauth/access_token', **kwargs)
    return response
