Improve configuration readability of the primary-identifier plugin

Signed-off-by: Ivan Kanakarakis <ivan.kanak@gmail.com>

Author: c00kiemon5ter

example/plugins/microservices/primary_identifier.yaml.example

@@ -22,20 +22,24 @@ config:
         - attribute_names: [eppn]
         - attribute_names: [name_id]
           name_id_format: urn:oasis:names:tc:SAML:2.0:nameid-format:persistent
-          # The line below addes the IdP entityID to the value for the SAML2 
+          # The line below adds the IdP entityID to the value for the SAML2
           # Persistent NameID to ensure the value is fully scoped.
           add_scope: issuer_entityid
         - attribute_names: [edupersontargetedid]
           add_scope: issuer_entityid
+
     # The internal SATOSA attribute into which to place the primary
     # identifier value once found from the above configured ordered
     # candidates.
     primary_identifier: uid
+
     # Whether or not to clear the input attributes after setting the
     # primary identifier value.
     clear_input_attributes: no
+
     # Whether to replace subject_id with the constructed primary identifier
     replace_subject_id: no
+
     # If defined redirect to this page if no primary identifier can
     # be found.
     on_error: https://my.org/errors/no_primary_identifier

src/satosa/micro_services/primary_identifier.py

@@ -62,7 +62,6 @@ def constructPrimaryIdentifier(self, data, ordered_identifier_candidates):
             # name_id_format add the value for the NameID of that format if it was asserted by the IdP
             # or else add the value None.
             if 'name_id' in candidate['attribute_names']:
-                candidate_nameid_value = None
                 candidate_nameid_value = None
                 candidate_name_id_format = candidate.get('name_id_format')
                 name_id_value = data.subject_id