Chore: Add username option for redis remote cache

docs/sources/setup-grafana/configure-grafana/_index.md

@@ -456,6 +456,8 @@ Example connstr: `addr=127.0.0.1:6379,pool_size=100,db=0,ssl=false`
 - `addr` is the host `:` port of the redis server.
 - `pool_size` (optional) is the number of underlying connections that can be made to redis.
 - `db` (optional) is the number identifier of the redis database you want to use.
+- `username` (optional) is the connection identifier to authenticate the current connection.
+- `password` (optional) is the connection secret to authenticate the current connection.
 - `ssl` (optional) is if SSL should be used to connect to redis server. The value may be `true`, `false`, or `insecure`. Setting the value to `insecure` skips verification of the certificate chain and hostname when making the connection.
 
 #### memcache

pkg/infra/remotecache/redis_storage.go

@@ -39,6 +39,8 @@ func parseRedisConnStr(connStr string) (*redis.Options, error) {
 		switch connKey {
 		case "addr":
 			options.Addr = connVal
+		case "username":
+			options.Username = connVal
 		case "password":
 			options.Password = connVal
 		case "db":

pkg/infra/remotecache/redis_storage_test.go

@@ -16,11 +16,12 @@ func Test_parseRedisConnStr(t *testing.T) {
 		ShouldErr     bool
 	}{
 		"all redis options should parse": {
-			"addr=127.0.0.1:6379,pool_size=100,db=1,password=grafanaRocks,ssl=false",
+			"addr=127.0.0.1:6379,pool_size=100,db=1,username=grafana,password=grafanaRocks,ssl=false",
 			&redis.Options{
 				Addr:      "127.0.0.1:6379",
 				PoolSize:  100,
 				DB:        1,
+				Username:  "grafana",
 				Password:  "grafanaRocks",
 				Network:   "tcp",
 				TLSConfig: nil,