No HTML a seguir, preciso obter o valor de login usando o Selenium Webdriver.

<div 
   roletitle="MD" 
   careteamrole="HOSPITALIST" 
   login="adamss" 
   isconsultctm="" 
   title="Adams Samuel" 
   style="" 
   class="assign_grid assign_grid_selected" 
   id="97">
</div>

Eu tentei o seguinte, mas falhou:

WebElement getAssigneeLoginWebElement = ieDriver.findElement(By.cssSelector(".assign_grid assign_grid_selected"));

sAssignedCTMLoginId = getAssigneeLoginWebElement.getAttribute("login");

sAssignedCTMLoginId = ieDriver.findElement(By.className("assign_grid assign_grid_selected")).getAttribute("login");

sAssignedCTMLoginId = ieDriver.findElement(By.xpath("//*[@class='assign_grid assign_grid_selected']/@login[1]")).getText();

Agradeço antecipadamente