Added read only host to DB connection

secrets_manager/secrets_manager.go

@@ -21,6 +21,7 @@ type DatabaseCredentials struct {
 	Host               string `json:"host"`
 	Port               int    `json:"port"`
 	InstanceIdentifier string `json:"dbInstanceIdentifier"`
+	ReadOnlyHost       string `json:"aurora_read_only_host"`
 }
 
 var (