'Generate the URL for the user to authorize the application.
Retrieves a request token from the Beatport API and returns the
corresponding authorization URL on their end that the user has
to visit.
This is the first step of the initial authorization process with the
API. Once the user has visited the URL, call
:py:method:`get_access_token` with the displayed data to complete
the process.
:returns:   Authorization URL for the user to visit
:rtype:     unicode'

def get_authorize_url(self):

    self.api.fetch_request_token(self._make_url('/identity/1/oauth/request-token'))
    return self.api.authorization_url(self._make_url('/identity/1/oauth/authorize'))
