fix some bugs

fir_ser/api/utils/app/iossignapi.py

@@ -167,7 +167,7 @@ class AppDeveloperApiV2(object):
             req.get_subject().C = 'CN'
             req.get_subject().emailAddress = 'fly@fly.com'
             req.set_pubkey(key)
-            req.sign(key, b'sha256')
+            req.sign(key, 'sha256')
             csr_content = dump_certificate_request(FILETYPE_PEM, req)
             with open(csr_file_path, 'wb+') as f:
                 f.write(csr_content)

fir_ser/api/utils/apple/appleapiv3.py

@@ -787,6 +787,6 @@ class AppStoreConnectApi(DevicesAPI, BundleIDsAPI, BundleIDsCapabilityAPI, Profi
     def create_certificate(self, csr_content, certificate_type='IOS_DISTRIBUTION'):
         req = super().create_certificate(csr_content,certificate_type)
         if req.status_code == 201:
-            self.__certificates_store(req, 201)
+            return self.__certificates_store(req, 201)
         raise KeyError(req.text)