Add Client Endpoint about beaver

[Clivern]

➜  ~ curl -X POST -H "X-AUTH-TOKEN: 123" -d '{}' "http://localhost:8080/api/client" | python -m json.tool

{
    "created_at": 1543585664,
    "id": "1dbb0ac1-97c5-4aa9-ba08-f02ebfb49b1a",
    "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkYXRhIjoiMWRiYjBhYzEtOTdjNS00YWE5LWJhMDgtZjAyZWJmYjQ5YjFhIiwidGltZXN0YW1wIjoxNTQzNTg1NjY0fQ.4yXo_g2OY31i9bwgPfkwLjls4nGXfiSGx0UM8Cvbw0k",
    "updated_at": 1543585664
}


➜  ~ curl -X GET -H "X-AUTH-TOKEN: 123" -d '{}' "http://localhost:8080/api/client/1dbb0ac1-97c5-4aa9-ba08-f02ebfb49b1a" | python -m json.tool

{
    "created_at": 1543585664,
    "id": "1dbb0ac1-97c5-4aa9-ba08-f02ebfb49b1a",
    "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkYXRhIjoiMWRiYjBhYzEtOTdjNS00YWE5LWJhMDgtZjAyZWJmYjQ5YjFhIiwidGltZXN0YW1wIjoxNTQzNTg1NjY0fQ.4yXo_g2OY31i9bwgPfkwLjls4nGXfiSGx0UM8Cvbw0k",
    "updated_at": 1543585664
}


➜  ~ curl -X DELETE -H "X-AUTH-TOKEN: 123" -d '{}' "http://localhost:8080/api/client/1dbb0ac1-97c5-4aa9-ba08-f02ebfb49b1a" -v         
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 8080 (#0)
> DELETE /api/client/1dbb0ac1-97c5-4aa9-ba08-f02ebfb49b1a HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.43.0
> Accept: */*
> X-AUTH-TOKEN: 123
> Content-Length: 2
> Content-Type: application/x-www-form-urlencoded
>
* upload completely sent off: 2 out of 2 bytes
< HTTP/1.1 204 No Content
< Date: Fri, 30 Nov 2018 13:48:47 GMT
<
* Connection #0 to host localhost left intact