MongoDB authentication failed for Replica Set

Working with Data Drivers
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2

User details :

ReplicaSet:PRIMARY> db.getUser("mongo_styli_coupon")
{
	"_id" : "styli_coupons.mongo_styli_coupon",
	"userId" : UUID("f9cc744e-1516-4106-9fe0-c2a2426b9f9b"),
	"user" : "mongo_styli_coupon",
	"db" : "styli_coupons",
	"roles" : [
		{
			"role" : "read",
			"db" : "admin"
		},
		{
			"role" : "readWrite",
			"db" : "styli_coupons"
		}
	],
	"mechanisms" : [
		"SCRAM-SHA-1",
		"SCRAM-SHA-256"
	]
}