如何通过android Volley或JSON从mysql中检索特定的行数据？

Hi guys i have already made login and register using volley library and data gets saved successfully as shown in the snap 1 below. Now my question is how to retrieve particular or specific row data for the particular user when he/she logins?? For example if user admin gets logged in how to fetch her entire row aloneHi guys i have already made login and register