Get the latest balance(s) for a single User.
    Currently no search parameters are supported. All balances returned.
    ---
    responses:
      '200':
        description: the User's balance(s)
        schema:
          items:
            $ref: '#/definitions/Balance'
          type: array
      default:
        description: unexpected error
        schema:
          $ref: '#/definitions/errorModel'
    security:
      - kid: []
      - typ: []
      - alg: []
    operationId: getBalance

def get_balance():
    """
    Get the latest balance(s) for a single User.
    Currently no search parameters are supported. All balances returned.
    ---
    responses:
      '200':
        description: the User's balance(s)
        schema:
          items:
            $ref: '#/definitions/Balance'
          type: array
      default:
        description: unexpected error
        schema:
          $ref: '#/definitions/errorModel'
    security:
      - kid: []
      - typ: []
      - alg: []
    operationId: getBalance
    """
    balsq = ses.query(wm.Balance).filter(wm.Balance.user_id == current_user.id)
    if not balsq:
        return None
    bals = [json.loads(jsonify2(b, 'Balance')) for b in balsq]
    print "returning bals %s" % bals
    response = current_app.bitjws.create_response(bals)
    ses.close()
    return response