Hello dev. Today u will know how api spiritually worked. For example: A group,B group,C group. I want to join A group by my id 1234. And i want B,C group to not have my id then <key1>A</key1> <key2>1234</key2>. So let say i want all group to have my id then <key1></key1> <key2>1234</key2>. Another method is i want a post comment lister that store comment,react,reply using one headline here is how it works. <pid>:GET(postid);</pid> <key1>comment</key1>. So if want to comment in each of the comment then <pid>:GET(postid);</pid> <key1>comment</key1> </key2>reply:GET(userid);</key2> in here both post comments count & comments replys count will be combine to gether. look just carmly settle down learn wapka. i also learn wapka too,u r expected to do thesame.