fix: pgsql user waiter

stackit/internal/wait/postgresflexalpha/wait.go

@@ -2,7 +2,10 @@ package postgresflexalpha
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"math"
+	"net/http"
 	"time"
 
 	"github.com/hashicorp/terraform-plugin-log/tflog"
@@ -40,7 +43,7 @@ type APIClientInstanceInterface interface {
 
 // APIClientUserInterface Interface needed for tests
 type APIClientUserInterface interface {
-	GetUserRequestExecute(ctx context.Context, projectId, region, instanceId string, userId int64) (
+	GetUserRequestExecute(ctx context.Context, projectId, region, instanceId string, userId int32) (
 		*postgresflex.GetUserResponse,
 		error,
 	)
@@ -202,3 +205,34 @@ func PartialUpdateInstanceWaitHandler(
 	handler.SetTimeout(45 * time.Minute).SetSleepBeforeWait(30 * time.Second)
 	return handler
 }
+
+// CreateUserWaitHandler will wait for instance creation
+func CreateUserWaitHandler(
+	ctx context.Context,
+	a APIClientUserInterface,
+	projectId, instanceId, region string,
+	userId int64,
+) *wait.AsyncActionHandler[postgresflex.GetUserResponse] {
+	handler := wait.New(
+		func() (waitFinished bool, response *postgresflex.GetUserResponse, err error) {
+			if userId > math.MaxInt32 {
+				return false, nil, fmt.Errorf("userId value is too big for int32")
+			}
+			userId32 := int32(userId)
+			s, err := a.GetUserRequestExecute(ctx, projectId, region, instanceId, userId32)
+			if err != nil {
+				var oapiErr *oapierror.GenericOpenAPIError
+				ok := errors.As(err, &oapiErr)
+				if !ok {
+					return false, nil, fmt.Errorf("could not convert error to oapierror.GenericOpenAPIError")
+				}
+				if oapiErr.StatusCode != http.StatusNotFound {
+					return false, nil, err
+				}
+				return false, nil, nil
+			}
+			return true, s, nil
+		},
+	)
+	return handler
+}