public async Task <Guid> AddRole(AddRoleCommand command, CancellationToken cancellationToken)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
command.EnsureIsValid();
var persistedRole = await authorizationRepository.GetRoleByName(command.Name, cancellationToken).ConfigureAwait(false);
if (persistedRole is not null)
{
throw new BusinessException(Messages.RoleAlreadyExist);
}
var role = new Role()
{
Name = command.Name,
Description = command.Description
};
await authorizationRepository.AddRole(role, cancellationToken).ConfigureAwait(false);
return(role.Id);
}