private User GetGraphUserForImpersonation(AzureConfig settings, GraphClient graphClient, UserMapping idUserMapping)
{
var usernameWithoutPrefix = settings.UsernamePrefixEnabled ? UserInfo.Username.Substring(AzureConfig.ServiceName.Length + 1) : UserInfo.Username;
var user = idUserMapping.B2cClaimName == "sub" ?
graphClient.GetUser(usernameWithoutPrefix)
: graphClient.GetAllUsers($"$filter={idUserMapping.GetB2cCustomAttributeName(settings.PortalID)} eq '{usernameWithoutPrefix}'").Values.FirstOrDefault();
return(user);
}