fix: use usageToString

Author: jremy42

internal/services/keymanager/key_resource.go

@@ -7,7 +7,6 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
 	key_manager "github.com/scaleway/scaleway-sdk-go/api/key_manager/v1alpha1"
-	"github.com/scaleway/scaleway-sdk-go/scw"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/locality/regional"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/services/account"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/types"
@@ -145,11 +144,7 @@ func resourceKeyManagerKeyRead(ctx context.Context, d *schema.ResourceData, m an
 	_ = d.Set("name", key.Name)
 	_ = d.Set("project_id", key.ProjectID)
 	_ = d.Set("region", key.Region.String())
-	_ = d.Set("usage", scw.OneOfToString(key.Usage, map[string]string{
-		"SymmetricEncryption":  "symmetric_encryption",
-		"AsymmetricEncryption": "asymmetric_encryption",
-		"AsymmetricSigning":    "asymmetric_signing",
-	}))
+	_ = d.Set("usage", UsageToString(key.Usage))
 	_ = d.Set("description", key.Description)
 	_ = d.Set("tags", key.Tags)
 	_ = d.Set("rotation_count", int(key.RotationCount))