Question: Is there a way to get the user id so I can use the method /users/{id}

I guess that for security you cannot asked the API give the id of a user with this openid Identification but is there another way? 

I suppose that I can use the /users with a filter by name and then in my app select the user that I want but is there a better way?

Answer: 
*First of all, I completely agree with Joel Potter's answer. However, here, I want to respond to the `feature-request` part of your question.*

I think that the Team needs to implement a small feature here on StackApps that was present during the private beta. 

I'm referring to a small banner at the top of each page here (the ones that are usually used on Trilogy sites before planned downtimes). **This banner should tell us the current status of the API and what version of the API is the newest**. 

Of course, once we reach multiple API versions (as explained in Joel Potter's answer), we might have this still display the latest version but **also link to a page with all versions**.
Well /stats indicates (current) API version

```
{
  "statistics": [
    {
      "total_questions": 39206,
      "total_unanswered": 6161,
      "total_answers": 95349,
      "total_comments": 135925,
      "total_votes": 299689,
      "total_badges": 61312,
      "total_users": 37454,
      "questions_per_minute": 0.08,
      "answers_per_minute": 0.16,
      "badges_per_minute": 0.10,
      "api_version": {
        "version": "0.8",
        "revision": "1.0.1234.5678"
      }
    }
  ]
}

```