DB connection done

Author: Shreya-1305

Backend/config.env

@@ -1,4 +1,5 @@
 NODE_ENV=development
 PORT=8000
-USER=shreya
-PASSWORD=123456
+USER=paintershreya
+DATABASE_PASSWORD=_gaJM3HSaC_St6n
+DATABASE=mongodb+srv://paintershreya:<PASSWORD>@plantworld.ntgc7.mongodb.net/