curl -X PUT -d "{\"connector.class\":\"JdbcSourceConnector\",\"connection.url\":\"jdbc:mysql://127.0.0.1:3306/test?user=root\",\"mode\":\"timestamp\",   \"table.whitelist\":\"login\", \"validate.non.null\":false, \"timestamp.column.name\":\"login_time\", \"topic.prefix\":\"mysql.\",   \"transforms\":\"InsertSource\", \"transforms.InsertSource.type\":\"org.apache.kafka.connect.transforms.InsertField\$Value\", \"transforms.InsertSource.static.field\":\"data_source\",  \"transforms.InsertSource.static.value\":\"MyLocalMySQL\"}" localhost:8083/connector-plugins/JdbcSourceConnector/config/validate --header "content-Type:application/json" |  python -m json.tool