Feature/get system token

[barbararochazup]

Issue Description

Implementation of Get system token endpoint

API Information

Request (if appropriate):

URL: GET /api/v1/system-token/{id}

Response:

Status: 200 OK

Payload:

{
  "id": "06666a99-7800-4c83-af2c-a1a1d5e1bb2e",
  "name": "Token Test",
  "permissions": [
    {
      "id": "12666a99-7800-4c83-af2c-a1a1d5e1bb3f",
      "name": "MAINTAINER"
    }
  ],
  "cretedAt": "2020-02-26 13:00:00",
  "author": "charlescd@email.com"
}

Status: 404 NOT FOUND

Payload:

{
    "id": "5832ec91-88c9-4ca5-861e-af49e655048e",
    "message": "Not found token",
    "Type": "NotFoundError",
    "timestamp": "1614345707",
    "meta": null
}

Status: 500 INTERNAL ERROR

Payload:

{
    "id": "5832ec91-88c9-4ca5-861e-af49e655048e",
    "message": "Internal error details",
    "Type": "InternaldError",
    "timestamp": "1614345707",
    "meta": null
}

Status: 400 BAD REQUEST

Payload:

{
    "id": "9cebaea5-69e6-4865-b0ec-aefa0ceadc65",
    "message": "Parse id failed",
    "Type": "ParseError",
    "timestamp": "1614356891",
    "meta": null
}