@GET
  @Path("{authorization_id}")
  @Produces("text/plain")
  @ApiOperation(value = "Get user authorization", nickname = "UserAuthorizationService#getAuthorization", notes = "Returns user authorization details.", response = UserAuthorizationResponse.class)
  @ApiImplicitParams({
    @ApiImplicitParam(name = "fields", value = "Filter user authorization details", defaultValue = "AuthorizationInfo/*", dataType = "string", paramType = "query")
  })
  @ApiResponses(value = {
    @ApiResponse(code = 200, message = "Successful operation", response = UserAuthorizationResponse.class)}
  )
  public Response getAuthorization(@Context HttpHeaders headers, @Context UriInfo ui, @ApiParam(value = "user name", required = true)
  @PathParam ("userName") String userName, @ApiParam(value = "Authorization Id", required = true) @PathParam("authorization_id") String authorizationId) {
    return handleRequest(headers, null, ui, Request.Type.GET, createAuthorizationResource(userName, authorizationId));
  }
Handles: GET  /users/{userName}/authorizations/{authorization_id}
Get a specific authorization.

@param headers         http headers
@param ui              uri info
@param userName        user name
@param authorizationId authorization ID
@return authorization instance representation
ambari-server/src/main/java/org/apache/ambari/server/api/services/users/UserAuthorizationService.java