Make sure there is no key error when removing the PWD entry from the cstr dict

Author: kummerer94

sql_server/pyodbc/base.py

@@ -300,7 +300,7 @@ def get_new_connection(self, conn_params):
         if auth:
             cstr_parts['Authentication'] = auth
             if auth == 'ActiveDirectoryInteractive':
-                cstr_parts.pop('PWD')
+                cstr_parts.pop('PWD', '')
                 cstr_parts['Trusted_Connection'] = 'no'
 
         connstr = encode_connection_string(cstr_parts)