[management] Add buffering for getAccount requests during login (#2449)

management/server/account.go

@@ -161,6 +161,8 @@ type DefaultAccountManager struct {
 	eventStore           activity.Store
 	geo                  *geolocation.Geolocation
 
+	cache *AccountCache
+
 	// singleAccountMode indicates whether the instance has a single account.
 	// If true, then every new user will end up under the same account.
 	// This value will be set to false if management service has more than one account.
@@ -967,6 +969,7 @@ func BuildManager(
 		userDeleteFromIDPEnabled: userDeleteFromIDPEnabled,
 		integratedPeerValidator:  integratedPeerValidator,
 		metrics:                  metrics,
+		cache:                    NewAccountCache(ctx, store),
 	}
 	allAccounts := store.GetAllAccounts(ctx)
 	// enable single account mode only if configured by user and number of existing accounts is not grater than 1