public String GetAuthorizationLink()
{
// TO DO : Add validations
Uri uriAuth = new Uri(ENDPOINT_AUTHORIZATION);
uriAuth = uriAuth.AddUriParameter("response_type", RESPONSE_TYPE_CODE);
uriAuth = uriAuth.AddUriParameter("client_id", _ClientId);
uriAuth = uriAuth.AddUriParameter("state", Guid.NewGuid().ToString("N"));
uriAuth = uriAuth.AddUriParameter("scope", String.Join(" ", SCOPE_offline_access, SCOPE_openid, SCOPE_bloodpressure, SCOPE_activity));
uriAuth = uriAuth.AddUriParameter("redirect_uri", _RedirectUrl.ToString());
return(uriAuth.ToString());
}