diff --git a/internal/repositories/aftermarket_devices.go b/internal/repositories/aftermarket_devices.go
index d4ecf337..4d10fe94 100644
--- a/internal/repositories/aftermarket_devices.go
+++ b/internal/repositories/aftermarket_devices.go
@@ -27,30 +27,9 @@ import (
 // @Param last [*int] "the number of devices to return from previous pages"
 // @Param before [*string] "base64 string representing a device tokenID. Pointer to where we start fetching devices from previous pages"
 func (r *Repository) GetAftermarketDevices(ctx context.Context, first *int, after *string, last *int, before *string, filterBy *gmodel.AftermarketDevicesFilter) (*gmodel.AftermarketDeviceConnection, error) {
-	var limit int
-
-	if first != nil {
-		if last != nil {
-			return nil, gqlerror.Errorf("Pass `first` or `last`, but not both.")
-		}
-		if *first < 0 {
-			return nil, gqlerror.Errorf("The value for `first` cannot be negative.")
-		}
-		if *first > maxPageSize {
-			return nil, gqlerror.Errorf("The value %d for `first` exceeds the limit %d.", *last, maxPageSize)
-		}
-		limit = *first
-	} else {
-		if last == nil {
-			return nil, gqlerror.Errorf("Provide `first` or `last`.")
-		}
-		if *last < 0 {
-			return nil, gqlerror.Errorf("The value for `last` cannot be negative.")
-		}
-		if *last > maxPageSize {
-			return nil, gqlerror.Errorf("The value %d for `last` exceeds the limit %d.", *last, maxPageSize)
-		}
-		limit = *last
+	limit, err := helpers.ValidateFirstLast(first, last, maxPageSize)
+	if err != nil {
+		return nil, err
 	}
 
 	where := []qm.QueryMod{}
diff --git a/internal/repositories/dcn.go b/internal/repositories/dcn.go
index 33891f65..b3847f92 100644
--- a/internal/repositories/dcn.go
+++ b/internal/repositories/dcn.go
@@ -72,7 +72,6 @@ func (r *Repository) GetDCNByName(ctx context.Context, name string) (*gmodel.Dcn
 var dcnCursorColumnsTuple = "(" + models.DCNColumns.MintedAt + ", " + models.DCNColumns.Node + ")"
 
 func (r *Repository) GetDCNs(ctx context.Context, first *int, after *string, last *int, before *string, filterBy *gmodel.DCNFilter) (*gmodel.DCNConnection, error) {
-	var limit int
 	limit, err := helpers.ValidateFirstLast(first, last, maxPageSize)
 	if err != nil {
 		return nil, err
diff --git a/internal/repositories/vehicles.go b/internal/repositories/vehicles.go
index b43dd74b..724198c5 100644
--- a/internal/repositories/vehicles.go
+++ b/internal/repositories/vehicles.go
@@ -15,7 +15,6 @@ import (
 	"github.com/DIMO-Network/identity-api/models"
 	"github.com/DIMO-Network/shared/db"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/vektah/gqlparser/v2/gqlerror"
 	"github.com/vmihailenco/msgpack/v5"
 	"github.com/volatiletech/sqlboiler/v4/queries/qm"
 	"golang.org/x/exp/slices"
@@ -139,33 +138,11 @@ const maxPageSize = 100
 // @Param last [*int] "the number of devices to return from previous pages"
 // @Param before [*string] "base64 string representing a device tokenID. Pointer to where we start fetching devices from previous pages"
 func (v *Repository) GetVehicles(ctx context.Context, first *int, after *string, last *int, before *string, filterBy *gmodel.VehiclesFilter) (*gmodel.VehicleConnection, error) {
-	var limit int
-
-	if first != nil {
-		if last != nil {
-			return nil, gqlerror.Errorf("Pass `first` or `last`, but not both.")
-		}
-		if *first < 0 {
-			return nil, gqlerror.Errorf("The value for `first` cannot be negative.")
-		}
-		if *first > maxPageSize {
-			return nil, gqlerror.Errorf("The value %d for `first` exceeds the limit %d.", *last, maxPageSize)
-		}
-		limit = *first
-	} else {
-		if last == nil {
-			return nil, gqlerror.Errorf("Provide `first` or `last`.")
-		}
-		if *last < 0 {
-			return nil, gqlerror.Errorf("The value for `last` cannot be negative.")
-		}
-		if *last > maxPageSize {
-			return nil, gqlerror.Errorf("The value %d for `last` exceeds the limit %d.", *last, maxPageSize)
-		}
-		limit = *last
+	limit, err := helpers.ValidateFirstLast(first, last, maxPageSize)
+	if err != nil {
+		return nil, err
 	}
 
-	var err error
 	var totalCount int64
 	var queryMods []qm.QueryMod
 	if filterBy != nil && filterBy.Privileged != nil {