Add workaround to reference user in E2E tests

On-behalf-of: SAP nils.gondermann@sap.com

Author: gndrmnn

internal/osclients/applicationcredential.go

@@ -55,17 +55,20 @@ func NewApplicationCredentialClient(providerClient *gophercloud.ProviderClient,
 }
 
 func (c applicationcredentialClient) ListApplicationCredentials(ctx context.Context, userID string, listOpts applicationcredentials.ListOptsBuilder) iter.Seq2[*applicationcredentials.ApplicationCredential, error] {
+	userID = GetUserIDOrTokenID(userID, c.client.ProviderClient)
 	pager := applicationcredentials.List(c.client, userID, listOpts)
 	return func(yield func(*applicationcredentials.ApplicationCredential, error) bool) {
 		_ = pager.EachPage(ctx, yieldPage(applicationcredentials.ExtractApplicationCredentials, yield))
 	}
 }
 
 func (c applicationcredentialClient) CreateApplicationCredential(ctx context.Context, userID string, opts applicationcredentials.CreateOptsBuilder) (*applicationcredentials.ApplicationCredential, error) {
+	userID = GetUserIDOrTokenID(userID, c.client.ProviderClient)
 	return applicationcredentials.Create(ctx, c.client, userID, opts).Extract()
 }
 
 func (c applicationcredentialClient) DeleteApplicationCredential(ctx context.Context, userID string, resourceID string) error {
+	userID = GetUserIDOrTokenID(userID, c.client.ProviderClient)
 	return applicationcredentials.Delete(ctx, c.client, userID, resourceID).ExtractErr()
 }
 
@@ -113,6 +116,19 @@ func (c applicationcredentialClient) GetApplicationCredential(ctx context.Contex
 	}
 }
 
+func GetUserIDOrTokenID(userID string, providerClient *gophercloud.ProviderClient) string {
+	// FIXME: This is mostly for E2E tests. As soon as ORC supports user resources,
+	// this will be obsolete as the userID will become a UserRef to an existing user.
+	if userID == "token" {
+		tokenID, err := GetAuthenticatedUserID(providerClient)
+		if err == nil {
+			return tokenID
+		}
+	}
+
+	return userID
+}
+
 func GetAuthenticatedUserID(providerClient *gophercloud.ProviderClient) (string, error) {
 	r := providerClient.GetAuthResult()
 	if r == nil {