public async Task <Response <string> > AddRoleAsync(AddRoleDto addRoleDto)
{
if (await _roleManager.GetRoleAsync(addRoleDto.Name) != null)
{
return(Response <string> .Fail("The role already exists. Please try a different one!"));
}
var appRole = _mapper.Map <ApplicationRole>(addRoleDto);
var rs = await _roleManager.AddRoleAsync(appRole);
return(rs.Succeeded
? Response <string> .Success(appRole.Id, "New role has been created")
: Response <string> .Fail("Failed to create new role"));
}