db={"User":[{"_id":{"$oid":"6039c2393b3fd51f3595d82e"},"name":"userONE","phoneno":"123456"},{"_id":{"$oid":"6039c2513b3fd51f3595d82f"},"name":"userTWO","phoneno":"1234567"},{"_id":{"$oid":"6039c25c3b3fd51f3595d830"},"name":"userTHREE","phoneno":"12345678"},{"_id":{"$oid":"6039c2673b3fd51f3595d831"},"name":"userFOUR","phoneno":"123456789"}],"UserChat":[{"_id":{"$oid":"6039c2c63b3fd51f3595d832"},"message":"from userTWO to userONE 1","receiver":{"$oid":"6039c2393b3fd51f3595d82e"},"time":{"$date":"2021-02-27T03:55:49.938Z"},"sender":{"$oid":"6039c2513b3fd51f3595d82f"}},{"_id":{"$oid":"6039c2df3b3fd51f3595d833"},"message":"from userONE to userTWO 1","receiver":{"$oid":"6039c2513b3fd51f3595d82f"},"time":{"$date":"2021-02-27T03:56:15.122Z"},"sender":{"$oid":"6039c2393b3fd51f3595d82e"}},{"_id":{"$oid":"6039c2fa3b3fd51f3595d834"},"message":"from userONE to userTHREE 1","receiver":{"$oid":"6039c25c3b3fd51f3595d830"},"time":{"$date":"2021-02-27T03:56:42.663Z"},"sender":{"$oid":"6039c2393b3fd51f3595d82e"}},{"_id":{"$oid":"6039c3003b3fd51f3595d835"},"message":"from userONE to userFOUR 1","receiver":{"$oid":"6039c2673b3fd51f3595d831"},"time":{"$date":"2021-02-27T03:56:48.247Z"},"sender":{"$oid":"6039c2393b3fd51f3595d82e"}},{"_id":{"$oid":"6039c369a8061225286e57d8"},"message":"from userTWO to userTHREE 1","receiver":{"$oid":"6039c25c3b3fd51f3595d830"},"time":{"$date":"2021-02-27T03:58:33.183Z"},"sender":{"$oid":"6039c2513b3fd51f3595d82f"}},{"_id":{"$oid":"6039c3b0a8061225286e57d9"},"message":"from userTWO to userFOUR 1","receiver":{"$oid":"6039c2673b3fd51f3595d831"},"time":{"$date":"2021-02-27T03:59:44.830Z"},"sender":{"$oid":"6039c2513b3fd51f3595d82f"}},{"_id":{"$oid":"6039c3d8a8061225286e57da"},"message":"from userTHREE TO userONE 1","receiver":{"$oid":"6039c2393b3fd51f3595d82e"},"time":{"$date":"2021-02-27T04:00:23.950Z"},"sender":{"$oid":"6039c25c3b3fd51f3595d830"}},{"_id":{"$oid":"6039c3eda8061225286e57db"},"message":"from userTHREE TO userTWO 1","receiver":{"$oid":"6039c2513b3fd51f3595d82f"},"time":{"$date":"2021-02-27T04:00:45.054Z"},"sender":{"$oid":"6039c25c3b3fd51f3595d830"}},{"_id":{"$oid":"6039c3f5a8061225286e57dc"},"message":"from userTHREE TO userFOUR 1","receiver":{"$oid":"6039c2673b3fd51f3595d831"},"time":{"$date":"2021-02-27T04:00:53.119Z"},"sender":{"$oid":"6039c25c3b3fd51f3595d830"}},{"_id":{"$oid":"6039c59ca8061225286e57dd"},"message":"from userFOUR to userONE 1","receiver":{"$oid":"6039c2393b3fd51f3595d82e"},"time":{"$date":"2021-02-27T04:07:56.268Z"},"sender":{"$oid":"6039c2673b3fd51f3595d831"}},{"_id":{"$oid":"6039c5a5a8061225286e57de"},"message":"from userFOUR to userTWO 1","receiver":{"$oid":"6039c2513b3fd51f3595d82f"},"time":{"$date":"2021-02-27T04:08:05.041Z"},"sender":{"$oid":"6039c2673b3fd51f3595d831"}},{"_id":{"$oid":"6039c5aea8061225286e57df"},"message":"from userFOUR to userTHREE 1","receiver":{"$oid":"6039c25c3b3fd51f3595d830"},"time":{"$date":"2021-02-27T04:08:13.924Z"},"sender":{"$oid":"6039c2673b3fd51f3595d831"}},{"_id":{"$oid":"6039c5daa8061225286e57e0"},"message":"from userTWO to userTHREE 2 ","receiver":{"$oid":"6039c25c3b3fd51f3595d830"},"time":{"$date":"2021-02-27T04:08:58.513Z"},"sender":{"$oid":"6039c2513b3fd51f3595d82f"}},{"_id":{"$oid":"6039c5efa8061225286e57e1"},"message":"from userFOUR to userTWO 2","receiver":{"$oid":"6039c2513b3fd51f3595d82f"},"time":{"$date":"2021-02-27T04:09:19.712Z"},"sender":{"$oid":"6039c2673b3fd51f3595d831"}},{"_id":{"$oid":"6039c5f2a8061225286e57e2"},"message":"from userFOUR to userTWO 3","receiver":{"$oid":"6039c2513b3fd51f3595d82f"},"time":{"$date":"2021-02-27T04:09:22.283Z"},"sender":{"$oid":"6039c2673b3fd51f3595d831"}},{"_id":{"$oid":"6039c60da8061225286e57e3"},"message":"from userTWO to userTHREE 3","receiver":{"$oid":"6039c25c3b3fd51f3595d830"},"time":{"$date":"2021-02-27T04:09:49.442Z"},"sender":{"$oid":"6039c2513b3fd51f3595d82f"}},{"_id":{"$oid":"6039c60ea8061225286e57e4"},"message":"from userTWO to userTHREE 4","receiver":{"$oid":"6039c25c3b3fd51f3595d830"},"time":{"$date":"2021-02-27T04:09:50.579Z"},"sender":{"$oid":"6039c2513b3fd51f3595d82f"}}]}

db.User.find()