(node:16442) DeprecationWarning: current URL string parser is deprecated, and will
be removed in a future version. To use the new parser,
pass option { useNewUrlParser: true } to MongoClient.connect.
DeprecationWarning: collection.ensureIndex is deprecated. Use createIndexes instead.
DeprecationWarning: collection.remove is deprecated.
Use deleteOne, deleteMany, or bulkWrite instead.
Solved: