| import importlib | 
 | import json | 
 | error_checker = importlib.import_module("fedcm.support.request-params-check") | 
 |  | 
 | def main(request, response): | 
 |   request_error = error_checker.tokenCheck(request) | 
 |   if (request_error): | 
 |     return request_error | 
 |  | 
 |   param_string = request.POST.get(b"params").decode("utf-8") | 
 |   param_obj = json.loads(param_string) | 
 |   if param_obj['a string'] != 'a value': | 
 |     return (550, [], "Incorrect parameters") | 
 |  | 
 |   response.headers.set(b"Content-Type", b"application/json") | 
 |   response.headers.set(b"Access-Control-Allow-Origin", request.headers.get(b"Origin")) | 
 |   response.headers.set(b"Access-Control-Allow-Credentials", "true") | 
 |  | 
 |   return "{\"token\": \"token\"}" |