Censoring hotfix (move-coop#557)

* censor sensitive data in debug log of copy statement

* censoring another logger

* only censor items when present

* censor non-None in unload()

parsons/databases/redshift/redshift.py

@@ -560,13 +560,18 @@ def copy(self, tbl, table_name, if_exists='fail', max_errors=0, distkey=None,
 
                 # Copy from S3 to Redshift
                 sql = self.copy_statement(table_name, self.s3_temp_bucket, key, **copy_args)
-                sql_censored = sql.replace(
-                    aws_access_key_id,
-                    'XXXXXXXXXXXX'
-                ).replace(
-                    aws_secret_access_key,
-                    'YYYYYYYYYYYYY'
-                )
+                sql_censored = sql
+                if aws_access_key_id:
+                    sql_censored = sql_censored.replace(
+                        aws_access_key_id,
+                        'XXXXXXXXXXXX'
+                    )
+                if aws_secret_access_key:
+                    sql_censored = sql_censored.replace(
+                        aws_secret_access_key,
+                        'YYYYYYYYYYYYY'
+                    )
+
                 logger.debug(f'Copy SQL command: {sql_censored}')
                 self.query_with_connection(sql, connection, commit=False)
 
@@ -666,15 +671,18 @@ def unload(self, sql, bucket, key_prefix, manifest=True, header=True, delimiter=
 
         logger.info(f'Unloading data to s3://{bucket}/{key_prefix}')
         # Censor sensitive data
-        logger.debug(
-            statement.replace(
+        statement_censored = statement
+        if aws_access_key_id:
+            statement_censored.replace(
                 aws_access_key_id,
                 'XXXXXXXXXXXX'
-            ).replace(
+            )
+        if aws_secret_access_key:
+            statement_censored.replace(
                 aws_secret_access_key,
                 'YYYYYYYYYYYYY'
             )
-        )
+        logger.debug(statement_censored)
 
         return self.query(statement)