from flask_restful import Resource

class Test(Resource):
    def get(self, thestr):
        return {'return':"id: %s" % thestr}
    def post(self, thestr):
        pass

api.add_resource(Test, '/Test', '/Test/<string:user>/<string:repo>')

from flask_restful import Resource

class Test(Resource):
    def get(self, user, repo):
        return {
            'user': user,
            'repo': repo
        }
    def post(self, user, repo):
        pass

$ curl http://127.0.0.1:5000/Test/assdfasdf/sdfsdfsd12313
{
    "user": "assdfasdf",
    "repo": "sdfsdfsd12313"
}