title: Can I change asp.net mvc 5 identity user ID from string(GUID) to int
body: <p>I wonder why asp.net mvc 5 Identity user uses string(GUID) as key not an int by default?</p>
  
  <p>Are there any reason to do this? I know that it is possible to change the key to int, but is this change good practice at all? </p>
  
  <p>May be this ids are kept somewhere in the cookie, or are used in OAUTH, and it is not recommended to do this?</p>